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Ophthalmology & Optometry/Questions Answered by Expert Dr. Margaret Placentra Johnston, OD

SubjectDate Asked
Small flashes1/29/2012
  Q: i sometimes have brief episodes of dark spots that flash in my central vision, they come and go all ...
  A: Well Michael, I can't be sure what the dark spots are but I will list some possibilities. If they ...
question about my eyes1/27/2012
  Q: I'm a male 39 years old , no known diseases. glasses for a year now (very low ) i'm nearsighted -1 I ...
  A: Right - the first part of your question - all the way up to the words "this all looks like eyestrain ...
question about my eyes1/27/2012
  Q: I'm a male 39 years old , no known diseases. glasses for a year now (very low ) i'm nearsighted -1 I ...
  A: No. If only one extraocular muscle is involved, you would have double vision in looking in one ...
question about my eyes1/27/2012
  Q: I'm a male 39 years old , no known diseases. glasses for a year now (very low ) i'm nearsighted -1 I ...
  A: NO - this is not normal. It sounds like you have a deficit in extra-ocular muscle function. Whether ...
Faint white spots1/25/2012
  Q: Lately when I look out the window and move my eyes from left to right I see small, faint white spots ...
  A: If the exact same image appears in the right eye and left eye at the same time, that would be ...
Faint white spots1/24/2012
  Q: Lately when I look out the window and move my eyes from left to right I see small, faint white spots ...
  A: What you describe sounds like vitreous floaters - except that most of us see floaters as black or ...
Swollen eye lid1/22/2012
  Q: I have 1 swollen eye lid, what could this be? Im only 13 and I ALWAYS take off my makeup before bed, ...
  A: If the swelling is still getting worse, you must absolutely go to the eye doctor! there is a type of ...
Dark spot in my vision1/16/2012
  Q: Good day doctor, am 28yrs old. I suffer from floaterd and am astigmatic. I seem to observe a small ...
  A: Please don't be afraid of the dilated exam. It does have to be done as part of your exam. And ...
sore/bruised eye1/15/2012
  Q: Margaret! So im 11 years old and female (thought i'd through that in). So about 2 days ago, my ...
  A: Ok. It sounds like you need to get to the eye doctor. Hopefully tomorrow. If you cannot get to the ...
sore/bruised eye1/15/2012
  Q: Margaret! So im 11 years old and female (thought i'd through that in). So about 2 days ago, my ...
  A: -) It is impossible to know whether your injury is serious without 1) knowing how hard he poked you ...
Contact lens problem1/14/2012
  Q: I have worn contact lenses for about 14 years. In the last several years, I haven't been able to get ...
  A: Well, without knowing your Rx and seeing those lenses on your eyes, I am not likely to have any ...
Watery eyes1/12/2012
  Q: For the past year, almost every time I walk into a store or walk through my school hallways, my eyes ...
  A: From the way you describe this, I would say it is most likely a reaction to some substance in those ...
episcleritis1/9/2012
  Q: i had lasik laser treatment about a year ago. now i had 2 episodes of episcleritis within 1 month ...
  A: There is no known correlation between LASIK and episcleritis in so far as the LASIK does not cause ...
Is something wrong with my vision?1/6/2012
  Q: Okay, so I'm not sure how to word this...but whenever people with perfect vision put on someone ...
  A: Ok Kristen. This is kind of an odd question. At first I was going to just say that you must be ...
keratoconus - I dont think I have it I think I was misdiagnosed12/14/2011
  Q: Last year I was diagnosed with Keratoconus, but I dont think I have it. I dont have one symptom of ...
  A: I am sorry, but I don't have nearly enough information to know whether you were misdiagnosed. ...
Vision Problem12/8/2011
  Q: Two years ago I was diagnosed with macular degeneration (maybe incorrectly). Two weeks ago I was ...
  A: It would have been best if, during the days your vision seemed perfect to you, an eye doctor could ...
Eyes burn when useing face cleaner.11/22/2011
  Q: I use a cotten ball and i start to clean my face. When i get near my eyes my eyes start to burn. I ...
  A: No, it is not normal for your eyes to burn while using such a product. Undoubtedly you have a ...
eye color change11/15/2011
  Q: I am a 54 year old male and my eyes have always been brown with a gold burst around the pupil. ...
  A: If they are both changing color together to roughly the same degree at the same time, I would not ...
QUESTION11/13/2011
  Q: I AM 41 AND NEARSIGHTED. I HAVE WORN -2.5 FOR ABOUT 15 YEARS. I RECENTLY HAD AN EYE EXAM AND THE ...
  A: Usually people around forty do not get more nearsighted - unless there is strain at the nearpoint. ...
Redness, irritation and discharge from eyes.11/11/2011
  Q: I started having itchy eyes and slight redness about 3 months ago and was given Moxifloxacin eye ...
  A: Well, I am sorry you are having so much trouble getting this resolved. You did not give me your age, ...
are glasses necessary11/9/2011
  Q: Margaret, My daughter who is 7 years old has a vision of 20/30. In her day-to-day activities she ...
  A: I am sorry. I would need some refractive information to answer this question. Is your daughter ...
reading Rx for medium myope11/8/2011
  Q: Let me preface the question by saying the seventh level of hell will freeze before I wear bifocals. ...
  A: The reading Rx is the algebraic difference of the reading "add" and your distance Rx. So if your ...
peeling eye11/6/2011
  Q: Today I noticed it felt like there was something in my eye. When I went to look in the mirror it was ...
  A: I don't think I have enough information to make an actual diagnosis, nor is this site meant to ...
a bump on the pink part in the corner of my eye?11/5/2011
  Q: i was putting on lotion and noticed in the corner of my eye (the pink part) the is a pink lump with ...
  A: If it is significantly different from the other eye and it is still there by the end of the weekend, ...
High Myopia11/4/2011
  Q: I started wearing glasses with power of -2 when I was 8 years old. Over time it worsened and now at ...
  A: Outside of LASIK or an intraocular contact lens, there is really nothing else likely to improve your ...
3D Glasses for viewing 3D Movies11/3/2011
  Q: http://www.3dglasses.net/ Many people are uncomfortable watching 3D Movies in Theaters because of ...
  A: Well, that is an interesting question. I don't believe there is a simple answer that would work for ...
Random Afterimage and Shakey Vision11/2/2011
  Q: Johnston, Very sparingly throughout my teenage and young adult years I have experienced random ...
  A: So...I am wondering if the dizziness and headache tend to occur simultaneously with the eyes ...
hi9/6/2011
  Q: I'm a graphic designer and I be on the computer alot. Can you tell me any good rules to not get a ...
  A: Eye strain can be avoided by being sure you have all refractive error corrected - especially ...
Are these two contact prescriptions very different?9/5/2011
  Q: Toric 8.7/14.4 +0.50 -3.75 x090 vs. Toric MED 14.4 +0.75 -3.75 x095 As far as affecting someone's ...
  A: The two prescriptions you list for the left eye are not very different, but in a sensitive ...
help6/28/2011
  Q: . well me having doubt..went to eye specialist today..Actually my dad passed away and i cried a ...
  A: Well, if your vision is getting better and was only blurry when you had been crying, there is no ...
floaters6/28/2011
  Q: I'm 30. I went in right away and they checked, without dialation, just with a light and said no ...
  A: ....you went in because you had floaters and they did not dilate you?? There is no way to check ...
Hi6/27/2011
  Q: What are glaucoma symptoms?
  A: The problem with glaucoma is it really has no symptoms until really late in the disease cycle. The ...
help6/25/2011
  Q: . well me having doubt..went to eye specialist today..Actually my dad passed away and i cried a ...
  A: My condolences on the loss of your father. As for your eyes, that is a very weak prescription.I ...
Hi6/18/2011
  Q: What kind of eye problems or eye disease Can using the computer alot in the future cause?
  A: So far as we know computers do not cause any long term damage to the eyes or any eye disease.what ...
Red eye6/15/2011
  Q: two days ago my eye suddenly became very very bloodshot and hurt mildly yesterday it started a VERY ...
  A: Ok, if your vision is perfectly normal in that eye and there is no real pain and the light ...
eye flashes6/14/2011
  Q: for about 2 weeks I have been experiencing flashing in my right eye, I had a head trauma 2 years ...
  A: Any new flashing lights seen only in one eye should be checked out immediately. There is a chance ...
Hi6/8/2011
  Q: I had a eye apptm and they gave me my new subscribtion but i took it to my country to get them there ...
  A: I don't know what country you are speaking of but I have seen prescriptions come in from all over ...
viral conjunctivitus?6/4/2011
  Q: A month ago my eyes starting looking really red and veins i never even new were there are now really ...
  A: Wow - I am sorry you are having such a difficult time with this. I very much doubt it is viral or ...
black eye with no pain, no injury, no swelling6/2/2011
  Q: I found your posting after waking this am with a very black eye, no swelling, no injury, no pain. ...
  A: Actually, I did not hear back from them. If there is a chance your eye got hit inadvertently and you ...
I am seeing everything pink5/26/2011
  Q: This has started happening for a month almost. Sometimes when I open my eyes after keeping them ...
  A: I have no way of knowing if your pink vision is a problem or not. I have never heard of this. If ...
Eye embers5/18/2011
  Q: I have floaters, which my eye doctor has told me to pay attention to for any changes. Earlier ...
  A: First, you should never rub your eyes, especially not that hard. Next, please notice whether the ...
variations in recent Rx's5/17/2011
  Q: I need to have ballistic protective lenses made up for a pair of glasses that I currently own. Due ...
  A: The difference between the two rx,s is not very great, though the first one is slightly stronger. I ...
floaters in my eyes5/10/2011
  Q: The other day I had a bad headache and my vision seemed blurry. I've had this before and was told it ...
  A: If you have not been to the eye doctor in a few years, you are definitely due for an exam, ...
My eyes5/8/2011
  Q: but whenever I look at specifically like Mardi gras beads or light reflecting off a bottle from a ...
  A: Well, I seriously recommend you see your eye doctor. I cannot say what it is without examining you. ...
bubble in cornea5/6/2011
  Q: First off I have fairly bad allergies. I usually get bright red eyes when I mow my grass from my ...
  A: I have seen this many times. It is usually allergic in nature, very acute, meaning it shows up very ...
Do I need to wear glasses5/4/2011
  Q: My prescription is Spherical +0.50 Cylindrical -0.25 Axis - 090 Prism - 1/2 I work in IT where I ...
  A: Well, I disagree with your friends. Small amounts of vision correction can help your visual ...
bifocals5/1/2011
  Q: I am nearsighted and bifocals were recommended a few years ago. I would rather not wear them, and ...
  A: I am sorry. I had answered this days ago, but sometimes it fails to click through to the point of ...
What is the problem with my eyes?4/30/2011
  Q: When i used to turn off the lights i could of see clear things but now when i turn of the ligths in ...
  A: I have no idea how old you are but it is somewhat normal to need more light to see things as you get ...
Eyelash growth products and side effects4/27/2011
  Q: Johnston, I have recently become interested in using eyelash growth products - however, there seem ...
  A: The only eyelash growth product I am familiar with is the prescription item Latisse. This is a ...
Is been on the computer to much bad?4/26/2011
  Q: Is been on the computer to much is bad for the eyes? And how long should i use the computer for?
  A: Being on the computer itself is not bad for your eyes. What can be stressful is if your eyes are not ...
Vision change4/25/2011
  Q: I normally have good vision, have never used glasses. My close up vision is not what it was when I ...
  A: Well, that really depends on your final distance correction, which I cannot tell without doing your ...
Vision change4/25/2011
  Q: I normally have good vision, have never used glasses. My close up vision is not what it was when I ...
  A: Ha - I sure wish you had included your age. Around the age of 40, most everyone's near vision ...
problem with glasses4/24/2011
  Q: I normally wear contact lenses for myopia, R eye -1.75 and L eye -2.00, had an eyetest recently and ...
  A: Eye doctors are accustomed to a very small percentage of people not being able to get used to a new ...
Frustration with new glasses4/22/2011
  Q: Greetings, I am 39 years old and have been wearing glasses since I was 14. My prescription is only ...
  A: Wow - it really does look like you have done all the right things to try and solve the problem on ...
one eye smaller than the other3/22/2011
  Q: took her to the doctor and he has sent her to see a specialist do you think i should be worried ...
  A: While I sympathize with your concern, there is not nearly enough information here for me to give you ...
Enlarged optic nerve3/18/2011
  Q: My now 9-yr old daughter was first observed to have an enlarged optic nerve 2 years ago. It is ...
  A: Most likely the enlarged optic nerve is just something that happened in the course of the ...
3 year old and farsightedness3/16/2011
  Q: My 3 1/2 year old daughter was diagnosed as being farsighted. The doctor said her vision was at a ...
  A: This is very difficult to answer because the doctor may have gotten +3 before he put the drops in, ...
plzz help me3/14/2011
  Q: 5 and 65 degree axxys and left eyes - 4 cyl .75 and 65 degree acyx i m pateint of diabetes last 6 ...
  A: I think you asked me this same question already earlier last week. Binocular vision means both eyes ...
binocular vision3/13/2011
  Q: i m feeling last six month i have binocular vision but my quesion is i take anti depresment medicine ...
  A: Well, binocular vision is the normal state. It means the eyes work together properly. I think what ...
fluid filled bubbles on scleras that won't go away3/11/2011
  Q: I have had these clearish yellow fluid filled bubbles on the whites of my left eye since I was a ...
  A: Are they really bubbles or maybe just some heaped up yellowish tissue? In the latter case, they are ...
Dumb Docters....3/2/2011
  Q: Margaret Placentra Johnston, I sent you a question a few months ago, In October I think, about weird ...
  A: I just now loooked up your question from October. I never saw the pictures you sent when I answered ...
Eye glass prescription3/1/2011
  Q: I have a question with regards to an eyeglass purchase I want to make online. I just went to my ...
  A: I am not 100% certain how it is in Canada, but in the US when the doctor writes a PRESCRIPTION, that ...
Pink Eye2/26/2011
  Q: Good morning, I am a healthy 33yr old woman who has been wearing contacts for about 15 years. A ...
  A: For some reason, your question did not list what country you are in (usually the questions do list ...
pupil size2/19/2011
  Q: I am 62 year old female, who is in great health, no high blood pressure, cholesterol, no diabetes, ...
  A: I am a big believer in consulting with a neuro-ophthalmologist with questions like these. Pupil ...
eye question2/18/2011
  Q: My son is 2 1/2 and loves to watch cartoons on the computer and ipad He is constantly on one of ...
  A: Yes, unfortunately I do believe it could cause problems. If very young eyes spend too much time ...
heavy myopic - black shadows/halos2/16/2011
  Q: I have been sort sighted for a good 25 years now. I am 30 years old and my sight is -9.25 at both ...
  A: If you are sure you have had a good retinal exam, and the shadow does not represent a retinal ...
eyes2/14/2011
  Q: why are my eye balls looking very small when i have very big egg shape eyes and from time to time my ...
  A: I cannot answer the first part of your question, but the "my pupils are small for about a week or so ...
Glaucoma2/13/2011
  Q: In my pharmacology class we are discussing glaucoma. Our instructor has just asked, "When a patient ...
  A: It is thought that the eye can only hold one drop at a time. Any subsequent drops are likely to ...
differenes in measurements2/9/2011
  Q: on 9/27/10 my eyes measured +1.75 -1.25 95 +2.75 +2.50 -1.25 1.25 +2.75 by Dr. no.1 and ...
  A: There seems to be an error on the left eye of prescription #1. (+2.50-1.25......? Did it perhaps ...
Do i need glasses & when should i wear them?2/7/2011
  Q: I have just had an eye test and been given my first prescription of -0.25 sphere, -0.25 cylinder, ...
  A: If you are having symptoms, you should try the glasses. You should wear them for the activities for ...
show me the way2/6/2011
  Q: Tear will shed your eye if I relate the misery I am undergoing.I live in a country in the Indian ...
  A: Well, I am certainly sorry about your unfortunate experience with your eye. Do I assume correctly ...
Sore eyes from reading1/22/2011
  Q: I get sore / tired eyes from reading books. I can pick up a book and within 10 or so pages my eyes ...
  A: That is curious. Most people get more symptoms from computer use than from reading paper. Did the ...
My new vision problem1/19/2011
  Q: I am a 33yr old female from Coimbatore, India. I have been diagnosed with 0.50 power in my left eye ...
  A: Sorry - "Rx" is just a shorthand term for "prescription." Since you already have the glasses, but ...
My new vision problem1/19/2011
  Q: I am a 33yr old female from Coimbatore, India. I have been diagnosed with 0.50 power in my left eye ...
  A: Ok my original answer stands. but there is something that should be specified on the Rx that I ...
My new vision problem1/18/2011
  Q: I am a 33yr old female from Coimbatore, India. I have been diagnosed with 0.50 power in my left eye ...
  A: A half diopter of cylinder in just one eye is not very much correction. If you are not having any ...
Lines appear curvy1/11/2011
  Q: Since 2 weeks while reading books I observed that suddenly some lines appear curvy/wavy. Some ...
  A: This is most unusual in someone your age. Older people can get swelling in the macula (most ...
optometric measurments1/10/2011
  Q: I found an old Rx from my eye doctor and wondered what spherical and cylindrical meant, and does it ...
  A: In a glasses Rx, the "Spherical" number refers to how much nearsighted or farsighted correction you ...
My contact lens prescription is different from my glasses prescription. Is it supposed to be like that?1/8/2011
  Q: I read the back of my contacts box and it said -3.75. Earlier this week I went to get a new pair of ...
  A: The same basic refraction must be done to generate a prescription for contact lenses and glasses. ...
contact lenses and dry eye/intolerance1/7/2011
  Q: I am a 22 year old female, and have worn daily disposable contact lenses for 10-11 years with no ...
  A: Do you know if either of the docs checked you for giant papillary conjunctivitis (GPC)? (They would ...
Slanted vision1/6/2011
  Q: I am having a problem. I noticed a couple of weeks ago, everything appears slanted to the left. When ...
  A: More than likely the explanation involves astigmatism. Since I don't know your age, how long it has ...
Visine after Lasik12/15/2010
  Q: I have gotten my lasik for almost a year already and I am wondering is it safe for my eyes to use ...
  A: It is not because you had lasik that I do not recommend Visine. I don't recommend that product for ...
new contact lens blurriness12/14/2010
  Q: I have recently tried contact lenses, monthly ones, the trial lenses have been fine and have been ...
  A: The numbers you give me for your prescription make sense, so I figure there must be something else ...
Ptosis11/26/2010
  Q: I'm 33 years old, and I've noticed that when the camera flashes one eye gets smaller than the other. ...
  A: Almost certainly it is not the eye that gets smaller but rather one lid closes more than the other ...
Hard, white dot on the iris of my eye.11/25/2010
  Q: I woke up this morning and it felt like I had a sty on my eyelid. It kept irritating me when I ...
  A: There are several possibilities, all of which require medical assistance. Especially as you are a ...
subjective&objective refraction11/24/2010
  Q: I'm 28yrs old& third yr optometry student.it would be so kind of you if u would explain to me in ...
  A: There are several reasons there may be a difference between subjective and objective refraction. ...
Strange pulling/stretching sensation11/7/2010
  Q: Dr. Johnston, I am a 33-year old woman and I'd like to ask about something that happened on ...
  A: Of course from here I cannot tell if the two are related. If I could order a CT scan for you I ...
Strange pulling/stretching sensation11/7/2010
  Q: Dr. Johnston, I am a 33-year old woman and I'd like to ask about something that happened on ...
  A: Until you told me about the Nov 6 occurrence, I was going to say my guess was simply eyestrain and ...
Vertical heterophoria11/6/2010
  Q: Johnston, I started to have eye strain and dizziness everyday since three months ago and went from ...
  A: I am glad you found suitable treatment for your symptoms. As for how many doctors treat vertical ...
eye injury11/2/2010
  Q: i would like to know whether there is any treatment for blood leakage in cornea?
  A: If there is blood you can see in the anterior chamber - the part of the eye behind the cornea and in ...
double vision10/31/2010
  Q: My right eye has macular degeneration but has a strong but nearsighted peripheral vision. This ...
  A: If your left eye is perfectly functional, and you feel you would function better with the right eye ...
swollen lids after cataract surgery10/30/2010
  Q: I had cataract surgery more than a year ago. The day after each proceedure that lower lid was very ...
  A: Hmm.. I have not heard that one before. I take it the lids are not itchy, your eyes are not red and ...
dizzyness10/29/2010
  Q: I'm a 46 year old woman and for the past 2 months have been dizzy to the point where I can't ...
  A: Wow - your dizziness is so bad that you feel trapped in your house? Have you consulted with your ...
Growths under eyelid10/26/2010
  Q: Dr. Margaret Placentra Johnston, I have had a problem with both of my upper eye lids since ...
  A: Without actually seeing the problem, it is difficult to say for sure but what you describe sounds ...
eyes10/21/2010
  Q: what does it mean when you have small black dots in your eyes
  A: Where exactly are these small black dots? If they are on the iris, the blue, green, grey or brown ...
2 questions10/18/2010
  Q: 10 double vision with new glasses that progresses each day. Othamologist says the prescription is ...
  A: I cannot believe an ophthalmologist and an optometrist would encourage you to ignore increasing ...
eye staining?10/14/2010
  Q: I was wondering if it's safe to use food coloring to temporarily dye the white of my eyes red for ...
  A: Certainly not. I am sorry to say that I know of no such "safe" dye for this purpose, nor is there ...
abberation10/13/2010
  Q: I recently got new glasses and I have noticed a blue and yellow-red outline to everything when I ...
  A: Abberations are caused by the material and design of the lens. did you perhaps get your lenses made ...
flickering in vision10/6/2010
  Q: i am a 26 year old female with no know health problems. 2 years ago i had my first child and about ...
  A: I am sorry this is causing you so much worry and concern. If you already had a dilated eye exam and ...
Progressive Lenses10/3/2010
  Q: Does the size of the lens make a difference meaning height & width not thickness? The reason I ask ...
  A: Hmm....the problem you describe is much more likely due to BRAND of progressive rather than size of ...
Misaligned eyes?10/2/2010
  Q: I'm 32 years old, I've been wearing glasses since I was 6 years old. I've known that I've had ...
  A: The lens the doc held over your eye was most likely a prism. Prism bends light so the image from ...
Do I need glasses?9/30/2010
  Q: I have noticed that I am having a huge increase in headaches that center right around my eyes. I ...
  A: A eye exam every so often is a good idea, even in the absence of symptoms, simply to check out eye ...
bubble on white of eye9/21/2010
  Q: Yesterday I accidentally squirted shampoo directly into my eye, today there is a bubble on the ...
  A: I would try putting in artificial tears very frequently all day. It should be somewhat better by ...
D.O can't find the right contacts for me9/20/2010
  Q: I would like to know why is it that the O.D can't find the right contacts for me, I've been wearing ...
  A: I am sorry you are having a hard time with your contact lens fit. The lens you report is a good ...
Eye tests with contacts9/16/2010
  Q: How long should you leave your contact lenses out before an eye/vision test?, or is it okay to leave ...
  A: Different eye doctors have different preferences for this. It may be best to ask the receptionist ...
Eyestrain9/13/2010
  Q: Margaret Placentra Johnston. I have a question for you about eyestrain. I looked up on what ...
  A: Ok, I guess I misinterpreted your question. By permanent you meant at every minute of their day, no ...
Eye problem after an injury9/12/2010
  Q: I am a 22 year male having severe myopia. Few months back i.e in the last month of march i received ...
  A: So there are two areas of concern as I see it. 1) the part of your head that got hit was most ...
Eyestrain9/11/2010
  Q: Margaret Placentra Johnston. I have a question for you about eyestrain. I looked up on what ...
  A: As an eye doctor my experience has been that people with eyestrain come to see me and we change ...
Eyestrain9/11/2010
  Q: Margaret Placentra Johnston. I have a question for you about eyestrain. I looked up on what ...
  A: I suppose, in an extreme case, this could be possible, yes. But eyestrain can usually be relieved ...
Vision9/10/2010
  Q: recently my vision has started bothering me..i see spots and its alittle hard to focus. its been ...
  A: Any time you start seeing new spots, you really should get an eye exam. In the worst case scenario, ...
Eye Lid Twitching9/9/2010
  Q: My eye lid has been twitching for about 2 weeks, any idea why? I have a history of allergies, had ...
  A: A lid twitch, called myokymia, is usually caused by either tiredness or stress or eyestrain. It ...
Floaters and diplopia9/7/2010
  Q: About six months ago I noticed a few floaters in my left eye. I know have several floaters in both ...
  A: Let me set your mind at ease to some extent by saying that the type of double vision that is caused ...
I can't focus with both eyes9/5/2010
  Q: Alright, I've read dozens of posts throughout the internet and I can't find an answer for my ...
  A: Your answer I believe lies in your choice of eye doctor. Many docs are focused (no pun intended) on ...
diffrence in pupils9/2/2010
  Q: difference is more obvious in dim light. and not noticeable in bright light. i been asking to my ...
  A: If the pupils both react to light to the same extent the difference is most likely "physiological" ...
Conjunctivitis9/1/2010
  Q: I have been having some sort of eye irritation for about 7 months now, its been on and off, and I ...
  A: Now when you have something like that, the correct thing to do is see an eye doctor. Assuming there ...
Blinking and squinting8/30/2010
  Q: My eyes are fine when I get up in the morning. Soon as I put my reading glasses on and read and go ...
  A: I would not worry too much. It sounds like you might have just had a change in eyeglass ...
One eye seems larger than the other8/22/2010
  Q: One of my eyes (the right) seems to be more forward in the socket, making it appear the be ...
  A: Oh my, I am sorry to tell you that there is another possibility that could make one eye move more ...
Dry eyes8/21/2010
  Q: As you know I have chronic dry eyes. I went to the eye doctor a month ago who said in one eye I ...
  A: Well, I am sorry you seem displeased with your doctor, but I suggest you make your own decisions ...
Dry eyes8/21/2010
  Q: As you know I have chronic dry eyes. I went to the eye doctor a month ago who said in one eye I ...
  A: These days they are discovering that a major cause of dry eye is inflammation that keeps the tear ...
prisms8/20/2010
  Q: I had a question about a recent eye exam I had. I am 23yo old, and I have been wearing glasses for ...
  A: I am sorry for your unfortunate experience. What prisms do is bend the light from one eye to meet ...
contacts8/18/2010
  Q: i have been wearing contacts for about two years now, and i went a week ago for a check-up and to ...
  A: If you have had the new lenses for a week now and still feel one eye is blurry, you should ...
eyes8/16/2010
  Q: I was using Blink artifical tears but they seem to thick and blurs my vision a lot even an hour ...
  A: I cannot recall an instance in which the use of artificial tears made it harder to get used to new ...
eyes8/16/2010
  Q: I was using Blink artifical tears but they seem to thick and blurs my vision a lot even an hour ...
  A: Second question first - how long it takes to get used to a new prescription varies immensely with ...
Red splotches and pain in eye8/14/2010
  Q: This morning I woke up with a pain in my good eye and red spots in my vision. Also, the inside ...
  A: Some optometrists have hours on Saturday. You should call around and see if you can find one. If you ...
blurred vision in the distance8/8/2010
  Q: I have been experiencing increasingly worse blur in the distance after reading/using the computer. ...
  A: Well, yes you could say this increased myopia is due to your intense studies but you should not feel ...
blurred vision in the distance8/8/2010
  Q: I have been experiencing increasingly worse blur in the distance after reading/using the computer. ...
  A: I think your problem is something we could call accommodative spasm. I am so glad you told me your ...
My sons eye.8/1/2010
  Q: I have a 5 yr old son, who recently went to the OD for his first eye exam. His eyes were dialiated. ...
  A: Sometimes in the ER the doctors are good at starting treatment but if they are not trained in the ...
something in the eye7/24/2010
  Q: I have something in my eye. First I tried to remove it without looking into the mirrow. But when I ...
  A: It could be a fluid filled cyst or it could be what we call a pingueculum or it could be a growth. I ...
confused with new presciption7/23/2010
  Q: I just went for an eye exam. It was first time in about 4 years. The prescription he gave me says ...
  A: Right, you are still nearsighted so you do need help with driving, especially night time and maybe ...
confused with new presciption7/22/2010
  Q: I just went for an eye exam. It was first time in about 4 years. The prescription he gave me says ...
  A: Um wow - that seems like a large difference to me too! The only explanation I can give you is maybe ...
Strabismus -Exotropia7/21/2010
  Q: my right eye has been misaligned for as long as I can remember but it has never really bothered me ...
  A: You did not tell me your age, which would have allowed me to give you a more specific answer, but ...
my prescription7/18/2010
  Q: I have recently had an eye test after not having one for 6 years and was quite suprised to learn ...
  A: Short sightedness or myopia is mostly hereditary but obviously environment has some effect as well. ...
my prescription7/18/2010
  Q: I have recently had an eye test after not having one for 6 years and was quite suprised to learn ...
  A: The change you have undergone is not the least bit unexpected for someone your age who is still a ...
Scratched Cornea?7/13/2010
  Q: I was poked in the eye yesterday and now the corner of my eye is a little pink. I was looking up ...
  A: If it is just a little pink, and you have absolutely no other symptoms--no pain, not even a hint of ...
nose duct surgery for eye problem7/8/2010
  Q: My friend has problem in one of her eyes (its watery, red & full of puss). She thought it was an ...
  A: Yes, there is such a thing as a blocked tear duct due to infection. The surgery recommended may ...
white discharge from eye7/3/2010
  Q: , My sister has terrible white discharge flowing from one of her eyes. Her eye is red and completely ...
  A: Um, when you say "consulted" do you mean she went to the office of several doctors and got examined, ...
Computer Lenses7/2/2010
  Q: I started wearing glasses 5 years ago and could not adapt to progressives. I now wear bifocals and ...
  A: There is a huge difference between a progressive lens designed for computer use and single vision. ...
eye chart6/24/2010
  Q: When the eye Dr. is asking the patient how far down he chart he/she can read the eye chart, how hard ...
  A: Well, to take this to a higher level of detail, the answer actually depends whether a person is ...
eye chart6/22/2010
  Q: When the eye Dr. is asking the patient how far down he chart he/she can read the eye chart, how hard ...
  A: I am with you Greg. I always word my question "What is the lowest line you can comfortably see?" ...
Prism in lenses6/20/2010
  Q: Can you buy bi-focals with a prism in the short sighted part of the lenses?
  A: The only type of prism that can be put just in the near focus part of a bifocal is what is called ...
Pink Eye6/19/2010
  Q: I am an adult who has acquired what the eye doctor suspects is pink eye caused by bacteria. I have ...
  A: You are wise in being very careful about spreading germs as kids are very susceptible to ...
Vision distortion6/12/2010
  Q: Six weeks ago my friend tickled me when I was sitting on the floor, put his knees tightly either ...
  A: Well, I cannot explain what happened or tell you how to fix it. But I do think the headache clinic ...
Partially open eyes when sleeping6/2/2010
  Q: Dr. Johnston, A long time ago back in my 20's when I tried to wear contacts, I had a terrible time ...
  A: My goodness - you sound like you have an extreme case of dry eye. There is a prescription ...
Keratoconus Eye Cramp5/30/2010
  Q: For the past couple months, my Keratoconus eye has uncontrollably been cramping. The cramps last a ...
  A: I have never heard of keratoconus causing any eye pain per se. I am wondering if when you say ...
Question5/28/2010
  Q: how are you going? :-) My name is Christina and I live in Australia. A few weeks ago, my Dad had ...
  A: There are several reasons your dad's eye pressure might be raised at this time. 1) as he is sick he ...
left eye looks smaller than right5/27/2010
  Q: about 4 months ago i had an eye infection and went to an ophthalmologist and got treated for it and ...
  A: What you are describing that had to be removed is what we call a chalazion. If your eye looks the ...
left eye looks smaller than right5/27/2010
  Q: about 4 months ago i had an eye infection and went to an ophthalmologist and got treated for it and ...
  A: It is most unlikely that an infection would lead to permanent swelling that would make that eye look ...
eye power5/25/2010
  Q: my power is-o.5 and -0.25 is it 6/6 ,if not then please tell me sir what is it ,am i fit for NDA eye ...
  A: There is no way to know what your vision is just from the prescription. 6/6 is the equivalent of ...
Eye Irritation After Swimming in Ocean5/24/2010
  Q: Yesterday I was swimming in the ocean in hawaii. Today I woke up with one eye very irritated. It ...
  A: Yes, you really need to see an eye doctor in the next day or so. There are various possibilities, ...
Glucoma5/20/2010
  Q: I have yesterday been diagnosed Glucoma in my right eye.I had no symptoms of Glucoma but the vision ...
  A: The fact that there are no noticeable symptoms until it really is too late is one of the scariest ...
continous watering coming from left eye in office aircondtioner5/19/2010
  Q: I am facing problem with continous watering coming from left eye in office aircondtioner and outside ...
  A: Watering could be from allergy or blocked tear ducts. But most likely (especially as it is present ...
Enlarged pupil5/18/2010
  Q: I noticed about a year ago that my left pupil stays enlarged, some days it's worse than others. The ...
  A: Wow - so the MRI and CT scan showed nothing? At least you have ruled out a brain tumor which is one ...
eye scratch5/14/2010
  Q: i scratched my eye about ten days back. i went to the doctor and she prescribed me eye drops. i ...
  A: There is no way to know if the eye will heal completely with the lubricant drops. If you saw the ...
Question on contact and eyeglasses Rx5/14/2010
  Q: I want to purchase some eyeglasses. I have worn glasses in the past, but it's been about eight years ...
  A: Most likely at your last eye exam for contact lenses, the doctor did everything that would be needed ...
eye scratch5/13/2010
  Q: i scratched my eye about ten days back. i went to the doctor and she prescribed me eye drops. i ...
  A: Sometimes when there is a scratch to the eye, it does not heal exactly perfectly. the top layer of ...
cataract5/9/2010
  Q: I am 76. My OD says she can see cataracts because of the reddish-brown color or my lenses. She sees ...
  A: No, it is not possible for you to see the discoloration yourself. Your OD can see the discoloration ...
Vision4/27/2010
  Q: Both eyes are -5.75 in my contact prescription. What is a estimate of where my vision is on a 20/20 ...
  A: It is not really possible to estimate Snellen acuity with any degree of accuracy based on the ...
cornea scarring4/25/2010
  Q: Margaret, i am concerned about the edge of plastic ruler that touched the corneas of my eyes some ...
  A: My feeling is, if the doctor could not see any damage with his slit lamp (which is a bio-microscope ...
Question regarding how to become an optometrist4/23/2010
  Q: I would like to know that in order to get into a four year optometry school do you need an ...
  A: Probably any science degree will provide you with the required prerequisite courses. I think most ...
eye problem4/20/2010
  Q: I am planning to make an appointment with my eye doctor or any that will take me tomorrow. In the ...
  A: the puffy sac sounds like it is most probably an allergic reaction, which also fits with the eye ...
does it benefit a moderate myopic to wear contacts or eyeglasses with LESS power than actual prescription?4/19/2010
  Q: the power of my eyeglasses is R -4.25D, L -4.00D and contact lenses is R 4.00D, L 3.75D. will it ...
  A: There is no universally correct answer to this question. It may depend upon your age. For example ...
Eyes and vision.4/17/2010
  Q: Hey Dr.Margaret Placentra Johnston. I have 2 questions for you. When you said that True double ...
  A: No - not permanently seeing double, but maybe permanently slightly more nearsighted. About the ...
AXIS4/16/2010
  Q: Why is it that on my eye glasses prescription it has OD -0.75 -1.75 25 OS -0.75 -1.75 165 but on my ...
  A: Well, I can certainly answer the first part of your question - for the most part contact lenses are ...
Career4/14/2010
  Q: I was wondering does your working hours interfere with your social life? Also do you get any free ...
  A: I assume you are asking me that as an optometrist, and perhaps you are interested in this field? I ...
Eyes and vision.4/13/2010
  Q: I do alot of work on my computer for instance I read alot of stuff on my computer, type to people on ...
  A: The short answer is: they are temporary. Your eyes will be less efficient and you will use more ...
cataract on pupil4/13/2010
  Q: I am 35 years old male in NJ and have been diagnose with cataract in my left eye. The cataract is ...
  A: Well, if the problem is truly a cataract, I am sure the doctors at least mentioned that the cataract ...
different contact lenses4/9/2010
  Q: At 52 my eye dr prescribed me multi-focal contacts for mono-vision. +.75 for one eye and -.75 for ...
  A: This is an excellent question. There is absolutely an advantage to using multifocal contact lenses ...
under eye puffiness with swollen eyelid4/7/2010
  Q: My left eyelid swelled up pretty bad and I suspected a stye. I went to the Dr. who diagnosed my ...
  A: I am sorry - I thought I had answered this earlier. No it is not typical for the acute part of the ...
under eye puffiness with swollen eyelid4/7/2010
  Q: My left eyelid swelled up pretty bad and I suspected a stye. I went to the Dr. who diagnosed my ...
  A: Now I can't see your eye, so I don't know how bad it is. But if the original swelling was on the ...
stye/sty??4/4/2010
  Q: Itchy "pimple" inside of my eyelid..? I'm worried I might have a sty/stye. I was rubbing my eye and ...
  A: A stye does not have to be on the tip of the eyelid. I recommend you try hot compresses (clean ...
opthometrist or ophthamologist.4/1/2010
  Q: My 10 years son had an screaning test at school and was told that he might need to wear glasses. I ...
  A: Either an optometrist or an ophthalmologist is fully trained to determine whether your son needs ...
Unique ability3/31/2010
  Q: I have the ability to blur my vision without squinting or changing the physical appearance of my ...
  A: I take it you are quite young and have a very flexible accommodation system. Accommodation is the ...
eye cornea3/30/2010
  Q: I have a bluish grey line around my cornea,I have noticed it that seems to be getting thicker and ...
  A: To my knowledge, arcus is not specifically related to anemia, but rather hypercholesterolemia (too ...
Eyes and vision.3/30/2010
  Q: I do alot of work on my computer for instance I read alot of stuff on my computer, type to people on ...
  A: While we can never be one hundred percent sure of anything about the human body, I meant to say that ...
eye cornea3/30/2010
  Q: I have a bluish grey line around my cornea,I have noticed it that seems to be getting thicker and ...
  A: Well, a few questions - is it in both eyes and does it circle all the way around the edge of your ...
Eyes and vision.3/29/2010
  Q: I do alot of work on my computer for instance I read alot of stuff on my computer, type to people on ...
  A: NO, you are not likely to become blind from using the computer so much. Blindness comes from eye ...
chalazion recovery3/27/2010
  Q: "Hello! I am 18 years old and i got a chalazion removed from my lower left eyelid a week ago. ...
  A: As I am not able to see the bump, it is hard for me to say whether it will ever go away. It could ...
New Glasses and Weird depth perception3/26/2010
  Q: I got new glasses today, and since then, my depth perception is all weird. For instance, I'm REALLY ...
  A: Sometimes weird distortions occur when someone gets a new Rx - until their brain gets used to the ...
fining markings3/24/2010
  Q: I just got new glasses and was told to see an Ophthalmologist, when I was him yesterday they told me ...
  A: I believe the ophthalmologist office was saying your glasses have "fitting markings." While we ...
Sensitive to Stimuli3/22/2010
  Q: I am having a horrible experience. When I take ritalin it feels as if my eyes are too sensitive to ...
  A: It sounds to me like you are having an adverse reaction to ritalin - or possibly too high of a dose. ...
cloudy and irriated eye3/21/2010
  Q: My left eye has been irritated for about 3 days,it stated with a slight burning and discomfort,after ...
  A: I believe the black spot (it was on your cornea, right? the front part of your eye - NOT the retina ...
Eye Issue3/20/2010
  Q: My wife is 42 years old and has relapse - remitting Multiple Sclerosis. She was diagnosed over 10 ...
  A: Macular degeneration is a disease of aging and is not at all likely in a 42 year-old, Multiple ...
retaining an image in the eye3/18/2010
  Q: I just experienced about 5 minutes of impaired vision, where it seemed as if I had looked at a ...
  A: It may well be something that is not dangerous at all - perhaps it was an ophthalmic migraine. I ...
wandering eye3/17/2010
  Q: My right eye sometimes goes off "by itself" towards my ear while my left eye stays focused straight ...
  A: I am amazed no eye doctor so far has chosen to discuss this with you without your asking, as surely ...
Pink Eyes and Contact Lenses3/15/2010
  Q: Johnston, I currently am on contact lenses wear and it seems that my eyes get pink (not red) within ...
  A: The number of hours a person can wear a lens varies greatly with the individual. Anywhere from 8 ...
Worsening visibility in 1 eye3/13/2010
  Q: Johnston, Hello and I hope that all is well with you. Recently, I did something kinda foolish, and ...
  A: Well, it sounds like you do have a situation going on there. Wearing a contact lens too long is not ...
eye health3/12/2010
  Q: could you tell me if it's possible to damage the eye by looking at a light other than the sun? I am ...
  A: Well, of course it depends on how long you were in this situation. If you didn't stare right at the ...
Addicted to Visine I think3/11/2010
  Q: I've been using Visine for over a year now, and simply can't leave the house without putting some ...
  A: The problem you describe is exactly what is wrong with using Visine on a regular basis - it kind of ...
viral conjuctivitis3/9/2010
  Q: I was diagnosed yesterday with bacterial conjunctivitis & given an antibiotic eye drop along with ...
  A: Assuming you are an adult, it is much more likely that you have viral conjunctivitis than bacterial. ...
Losing Eye Sight3/7/2010
  Q: Good Evening Dr.Johnston- I am curious if wearing contacts can make your vision worse. This is the ...
  A: It is not very likely that the contact lenses have caused this change, but there is a whole host of ...
Question regarding how to become an optometrist2/27/2010
  Q: I would like to know that in order to get into a four year optometry school do you need an ...
  A: You cannot go to Optometry school directly after high school. Most people in Optometry school have ...
Contact lenses2/26/2010
  Q: I know this is kind of a STUPID question, and i kinda feel like an idiot asking it but Can you can ...
  A: I am sorry but no, you cannot wear two pair of contacts at the same time. The added pressure from ...
infant iris dark spot2/25/2010
  Q: I just noticed my 2 month old has a very dark spot below her pupil on her iris on one eye (eyes are ...
  A: I would have the pediatrician look at it. He or she can document its size and note if it is ...
Contact Prescription2/22/2010
  Q: I received a contact lense fitting last year (January) with contacts that had BC 8.4 D 14.0 ...
  A: The December eye doctor should have written you a new contact lens prescription if s/he thought you ...
Progressive+Regaressive photophobia2/21/2010
  Q: I have been photophobic, with double vision, since age 12 esp, but as a swimmer from age 3, allergic ...
  A: Well, I visited your website. It is very good. And I thought a lot about your case. You have my ...
Whites of eyes2/20/2010
  Q: My daughter is in her 50's and the whites of her eyes have always been very white. In the last year ...
  A: Your daughter should see an eye doctor. It will be important to determine whether the "gray" is ...
Clear Care and Saline2/18/2010
  Q: Johnston, I am currently a contact lenses wearer and I think my eyes MIGHT be allergic to ...
  A: The safest thing would be to put the contact lens back in the case with fresh Clear Care solution ...
Clear Care and Saline2/18/2010
  Q: Johnston, I am currently a contact lenses wearer and I think my eyes MIGHT be allergic to ...
  A: The Clear Care solution is peroxide (kills germs really well!) when you pour it into the container - ...
Optometrie2/16/2010
  Q: I am in grade 9, and in sec three,we have a pop coarse. each term you have to learn about a new ...
  A: The amount of medical work done by an Optometrist depends tremendously on the setting in which he or ...
First Time with Glasses2/1/2010
  Q: I recently went for my first eye exam in about 10 years and came away with the following ...
  A: In general, we only want you to use your glasses when you really need them - but this can differ ...
Eye Issue1/31/2010
  Q: For the past 4-5 days I have had a problem with my eyes. I break into a stare very frequently and ...
  A: Well, you definitely need an eye exam and most likely need computer glasses. It is very possible to ...
Depth Perception1/30/2010
  Q: My husband has a problem with depth perception- he doesn't see in 3 D, and I was wondering if there ...
  A: The answer will depend on the reason for which your husband lacks depth perception. There is such a ...
contact lense solution1/28/2010
  Q: Dr. Johnston, If a person was allergic to a contact lense solution such as renu, optifree, etc ...
  A: There is no way to know for sure if the problem you describe in your first paragraph is due to an ...
Red Eyes with no other symptoms1/26/2010
  Q: Dr. Johnston: When eyes get red, but they are not itchy nor do they hurt, what can that mean if the ...
  A: Not everyone has the same symptoms for the same condition, so just because you don't have itching ...
Contact Lenses1/25/2010
  Q: Dr. Johnston: I have always used opti-free replenish for my contacts. They do not make my eyes itchy ...
  A: The contact lenses that allow more oxygen to the eyes, like the Biofinity lens, do not suck up more ...
Vision Improvement1/24/2010
  Q: My current contact lenses/glasses prescription states the following: OD Power -2.25 -1.75x170 BC 8.6 ...
  A: Between your previous Rx and the new one, there is only a small amount of "improvement" and yes, ...
Eye tests1/23/2010
  Q: I am male, 51. I started using progressive bifocals a few years ago. It seems like every couple ...
  A: It is normal that you need to increase the power of the reading lenses every year or two from age ...
contact lenses and red eyes1/22/2010
  Q: Johnson, I have biofinity contact lenses right now and when I wear them, there's no irritation or my ...
  A: Certainly contact lenses can be the cause of your eyes remaining red or pink for a few more hours ...
contact lenses and red eyes1/22/2010
  Q: Johnson, I have biofinity contact lenses right now and when I wear them, there's no irritation or my ...
  A: If your contact lenses give you any symptom at all, there could be a problem with the fit. They are ...
contact lenses: too many numbers!1/21/2010
  Q: Johnston, My son got a prescription for contact lenses, and I'm trying to buy them on-line. However, ...
  A: From what I can tell, you do not specifically have a prescription for contact lenses. Was your son ...
clear care soluion with optifree replenish1/20/2010
  Q: Johnston, I was wondering if you can advise me on how to use clear care eye solution. My eye doctor ...
  A: I am having a small amount of confusion regarding your use of the word proclear. did you mean to ...
Prescription Question1/19/2010
  Q: Just a simple question. I'm a 44 year old female. Worn contacts for years. I have astigmatism. I am ...
  A: I wish I knew what you meant by saying you see better without the contact lenses on. Would that be ...
It got poked1/17/2010
  Q: Background: I'm 26 and female. I poked my eye two or three months ago in a play fight with my ...
  A: I believe you have what is called recurrent erosion. This means that though your eye initially ...
transparent dot tracks my vision1/15/2010
  Q: When I focus my left eye on the center dot of the amsler grid, a transparent dot will cover the ...
  A: The key question here is - was this dot like this the last time you saw your ophthalmologist? If ...
Eye Glasses1/14/2010
  Q: My name is Dawn, I am 33 years of age and just went the other day to the eye doctor to have my eyes ...
  A: This is very hard to say without knowing if you are now nearsighted, farsighted or have astigmatism. ...
herbs and suppliments for eye health?1/13/2010
  Q: I am 63 and wonder if herbs and/or supplements are a good idea for better eye health? If so, what to ...
  A: The biggest deal these days is to try and maintain macular health. While many other eye disorders ...
blurring eyes1/12/2010
  Q: I have this ability to blur my eyes on demand and then make them go clear again with thinking about ...
  A: Well, it is kind of assumed that you will have your focusing mechanism relaxed when they are running ...
Do i really need glasses1/11/2010
  Q: I have started noticing that my vision can become blurred especially at distance. I am a 28 male ...
  A: The answer to whether you need glasses lies in your symptoms. You said yourself your vision ...
contact strength to 20/20 scale1/10/2010
  Q: My contact strength is -3.00 in both eyes. What is my vision on the 20/20 scale?
  A: There is no exact correlation between the strength of your contact lenses and your visual acuity on ...
Flashes in right eye.1/9/2010
  Q: I don't have insurance or the money to see an eye doctor so I decided to ask you. Since a week ago I ...
  A: No, that effect most likely does not come from being burned by the sun. I really do not know what ...
Flashes in right eye.1/9/2010
  Q: I don't have insurance or the money to see an eye doctor so I decided to ask you. Since a week ago I ...
  A: First of all, the floaters most people experience are black or clear, not white. I have actually ...
red eyes1/6/2010
  Q: I know red eyes can have a lot of different meanings but I have had bloodshot eyes on and off for a ...
  A: Red and watery eyes (without the yellow, sticky discharge, which would suggest a bacterial ...
flash of light in eye1/5/2010
  Q: I have had constant flash of light in my right eye for 5 days. Had it checked by Optometrist. He ...
  A: The flash of light from a PVD can last anywhere from days, to months. I am pretty sure your ...
Contact Prescription1/4/2010
  Q: I recently got a new contact prescription I went from a 2.50 to 3.00. I have been getting headaches ...
  A: Sure, it could be because the new contact lenses are too strong, but it could be a host of other ...
eye infection12/21/2009
  Q: my eye is red and puffy. when i woke up this morning there was puss/gook in it and it doesnt open ...
  A: You certainly do sound like you have a real eye infection. You must discard both of your current ...
contacts12/20/2009
  Q: I wear Acuvue 2 contacts.....my presciption is for an 8.3 base curve....I mistakenly was sent some ...
  A: The issue is really not so much whether it is safe to "try" them, but rather the fact that your ...
my 7 year old12/18/2009
  Q: SPH CYL AXIS OD +5.50 -4.50 005 OS +3.75 -2.75 175 ...
  A: Oh - well this is a rather heavy prescription - especially for a 7 year old. However, IF her acuity ...
Vision Disturbances12/13/2009
  Q: I have been having some vision problems and am not sure what to make of them. I am 28 and am fit ...
  A: Yes, a lot of what you describe does sound like it could be attributed to eyestrain. EXCEPT for one ...
vision changed only in one eye in 6 months12/12/2009
  Q: i went to my eye doctor to order new contacts and to get new lenses put in my glasses. after they ...
  A: Well, that is strange. I take it you mean the new glasses are blurry in the right eye, while the ...
Eye visits12/11/2009
  Q: why does the doctor only spend five minutes with me and the other people do all the work?
  A: Well, the reason is that market forces (i.e. particularly the managed care industry -with their ...
my macula problem12/8/2009
  Q: I am Roohollah, 28 years old. I already received your reply to my question. thanks for your answer. ...
  A: Coatex is not a word I am familiar with. But if you have had bleeding of the tiny blood vessels of ...
Effects of popping ears on eyes12/7/2009
  Q: Placentra Johnson, I have a strange question. I have been traveling a lot over the past couple of ...
  A: The answer to your question is almost 100% no. There are two main types of glaucoma (and many ...
Effects of popping ears on eyes12/6/2009
  Q: Placentra Johnson, I have a strange question. I have been traveling a lot over the past couple of ...
  A: I don't know how hard you are blowing, but that is supposed to be bad for your nose! As for your ...
flashing light, dark spot12/5/2009
  Q: My 62 year old husband was experiencing a flashing strobe-like light just to the right of his right ...
  A: Yes, he definitely should be seen. Most likely this is a posterior vitreous detachment, very common ...
constant red eyes.12/4/2009
  Q: my situation may be rare.... i have had constant red eyes for over a decade and it really doesn't ...
  A: Well, I certainly understand why the eye drops only help for a short while. Those products mostly ...
Eye test and driving12/1/2009
  Q: Have recently had eye test and been given prescription -.75 -.5. Been told that my vision has ...
  A: You had such a very small amount of astigmatism, it is entirely possible that it might not show up ...
yeast eye infection11/29/2009
  Q: For the last 3 months I have been plagued with itchy, watery eyes, which look swollen. I have been ...
  A: Have you explained your suspicions to the eye doctor? It sounds to me it would be about time to ...
Eye redness & sore11/12/2009
  Q: I got an eye sore on both of my eyes and I got headache as well due to the fresh paint and varnish I ...
  A: Wow - I am having a hard time understanding what you mean by an "eye sore." If there is actual ...
I just got my first pair of glasses and now I feel cross-eyed when I take them off.11/10/2009
  Q: I am 26 years old. I recently had my first eye exam. I always thought I had very good vision until ...
  A: Seeing that your Rx is significant, and you never wore glasses before, I would expect you to have ...
bulging eye11/4/2009
  Q: I'm a 21 year old female. Last night I was taking out my contacts and i noticed that my left eye ...
  A: I would avoid use of your contact lenses tomorrow. If the eye is still bulging the next day, and ...
RCE Recurring Chronic Erosion10/31/2009
  Q: Treatment for Chronic Eye Erosion.
  A: Well, there are a few treatments. At first they usually try heavy use of artificial tears. If that ...
Pigment deposits10/29/2009
  Q: How do you get rid of pigment deposits on the white of your eye? Because i have a brown spot on the ...
  A: I am sorry to tell you - it is not really possible to get rid of those spots. It would be sort of ...
Elevated Optic Discs10/27/2009
  Q: I'm an 24 year old female. I visited my Ophthalmologist today...everything seemed normal at first ...
  A: The issue with the elevated discs is that there is concern you could have something behind your eyes ...
90 year old Mother10/26/2009
  Q: My mother is 90. I recently became her caretaker and am responsible for taking her to all her ...
  A: Well, let's not jump to conclusions about this unless and until your eye doctor says it is your only ...
babys pupils10/25/2009
  Q: i have a week old baby and am wondering if it is normal for her pupils to be round on top and oval ...
  A: No, that is not really normal. There is no hurry but eventually you should take your baby to a ...
90 year old Mother10/24/2009
  Q: My mother is 90. I recently became her caretaker and am responsible for taking her to all her ...
  A: Your question is very hard to answer without actually examining your mother (although the picture ...
clarification10/23/2009
  Q: I had a recent eye check up. my power details are as follows- right eye: sph : -9.5 cyl: -0.5 axis: ...
  A: Possible reasons for your problem are listed below: 1) are your sure both your old glasses and the ...
Lazy eyelid and misshapen iris in baby10/21/2009
  Q: My four-month-old son's left eye sometimes appears smaller than the right, especially when he is ...
  A: Well, you do definitely need to see a pediatric ophthalmologist. This sounds like a nerve deficit ...
Eye muscles10/20/2009
  Q: My 8 year old son had an eye exam at school and they sent a letter home stating he has a eye muscle ...
  A: With all due respect to your school screeners, if your son already has glasses AND has had an eye ...
inside of eyelid10/19/2009
  Q: it has a long thin layer of skin coming out from where the eye ends. It is very red, I have ...
  A: You MUST see an eye doctor as soon as possible. It sounds like an infection but there are different ...
severe infection and corneal abrasion from organic matter in child eye for 2 weeks10/18/2009
  Q: My 14 year old son ran thru a bush and complained he had a piece of a stick in his eye. We took him ...
  A: I am so sorry that you and your son had to go through this experience. I know the pain he suffered ...
glaucoma10/17/2009
  Q: Generally, what should be the target eye-pressure for the treatment of glaucoma (not normal-tension ...
  A: Target pressure is determined on an individual basis for each patient, depending upon various ...
Eye blurriness10/16/2009
  Q: A little background before my question...I recently had an eye exam, which I felt was a good exam, ...
  A: IF your contact lenses are rigid gas permeable lenses, then everything you describe is a somewhat ...
Something stuck in my eye for months...10/15/2009
  Q: I have had something stuck in my eye for abou 4 or 5 months. It doesn't bother me constantly, and ...
  A: You must see an eye doctor. There could actually be something tucked up under your eyelid that you ...
Halo's in line of vision10/13/2009
  Q: I have had halo's in my line of vision for about a year ago. There is one in each eye, it almost ...
  A: Did you mention this particular symptom to the neurologist? If not, a different type of testing may ...
Right eye a bit blurr with the new glasses10/6/2009
  Q: Margaret, I am Taymour from Djibouti, will appreciate highly if you could enlighten my path on this ...
  A: The "A" in your glasses stands for the "axis" of the astigmatism. Astigmatism is where you have a ...
can't cry out of one eye10/5/2009
  Q: I haven't been able to cry (no over-flow of tears)out of right eye for several months. Otherwise the ...
  A: When a person cries it is the lacrimal gland that is supplying the extra watery tears that run ...
glaucoma10/5/2009
  Q: 1. If glaucoma is in one eye, some doctors prescribe glaucoma drops for this eye, while some doctors ...
  A: 1) Sometimes glaucoma drops are prescribed prophylactically - to prevent glaucomatous damage that ...
Kaleidoscope eyes10/4/2009
  Q: kaleidoscope eyes.. I lost the sight in my left eye completely for 10 minutes, all I could see was ...
  A: This may have been an ophthalmic migraine, which is relatively harmless, but you really should see a ...
broken blood vessels10/4/2009
  Q: I developed a small red spot in my eye yesterday morning. I do not recall doing anything to my eye. ...
  A: I don't think you need to be concerned. The blood that leaks out of the blood vessel usually does ...
vertical / horizontal vision10/4/2009
  Q: i have the foll question : foll has happened to me 3-4 times in the past few years: all of a ...
  A: You may be having ophthalmic migraines, which are relatively harmless, but you really should see a ...
Problems adjusting to new RX10/2/2009
  Q: I have had a recent prescription change as below: Old prescription: R: -3.00 L: -3.00 -0.25 155 ...
  A: There are definitely people who just have a more difficult time adjusting to a new Rx. I recommend ...
2 yr old diagnosed with accommodative esotropia10/2/2009
  Q: Last week my 2 yr old daughter suddenly started crossing her eyes. She doesn't do it all the time, ...
  A: If your daughter is +6.00 and is crossing her eyes, she definitely needs glasses. The glasses are ...
Incorrect base curve?10/1/2009
  Q: I recently went to an optometrist and got a new prescription for Acuvue Oasys contacts with a base ...
  A: It could be due to the base curve, or you may not react well to the silicone material the Oasys is ...
optometrist vs ophthamologist10/1/2009
  Q: i told a co worker that an optometrist gives you a better eye glass prescription than an ...
  A: I cannot imagine WHERE your co-worked got the idea that an Optometrist cannot write a prescription ...
sudden red line near iris10/1/2009
  Q: I noticed at the end of the day a red spot on the outer part of my eye near the iris. The next ...
  A: I am going to guess and say that the similarity to the tent waterproofing in your eye to what you ...
Interview for school9/30/2009
  Q: Johnston. My name is Isabella Betkowski and I am 13 years old. I am doing a science career project ...
  A: Sure Isabella - that is a fun question - Optometry career - Optometrists examine eyes for 1) ...
my daughter mild cataract9/30/2009
  Q: my 2 years old daughter was born with a small cataract in her left eye.doctor said that it will not ...
  A: That depends upon the size of the cataract. Actually, many people are born with a very small ...
Reading Rx and Distance Rx - Opposites?9/29/2009
  Q: Are the numbers associated with a distance Rx (e.g., -6.50) and a reading Rx (e.g., +1.50) ...
  A: To your first question, yes, the numbers from the distance Rx and the near "add" are added ...
cancer/eyes9/29/2009
  Q: After 8 chemotherapy treatments for breast cancer, I'm having difficulty with my eyes. It has been ...
  A: Yes, I have heard of excess tearing beginning when the patient is undergoing chemotherapy. I was ...
Glasses for my 7 year old9/28/2009
  Q: During a recent annual check up, my son's PCP noticed a decline in his vision. I took him to an ...
  A: Well, that will be hard to say without knowing how much astigmatism there is (in diopters.) At ...
Prisms-Botched exam?9/27/2009
  Q: I have been wearing prisms for about 40 years. My initial physician speculated the double-vision and ...
  A: Well, of course it is annoying that the doctor has not taken the time to respond to your inquiries. ...
No depth perception9/27/2009
  Q: I recently went into an Army hospital to have a flight physical to be a UAV operator. I was given a ...
  A: Depth perception comes from the discrepancy between the way each of the two eyes sees things, since ...
Prisms-Botched exam?9/26/2009
  Q: I have been wearing prisms for about 40 years. My initial physician speculated the double-vision ...
  A: Actually the need for prism is easy to miss in a routine exam. I don't believe most doctors do all ...
ever increasing prescription9/25/2009
  Q: i have recently had an eye test and have found out that my short sightedness has got worse, , my ...
  A: Actually, there is controversy over whether reading with your correction on, or wearing glasses that ...
ever increasing prescription9/25/2009
  Q: i have recently had an eye test and have found out that my short sightedness has got worse, , my ...
  A: Your eyes still getting worse while you are still in the university is not so unusual, though that ...
CT Scan9/24/2009
  Q: Why would my mother have been told she needs a CT scan done of her eyes? She has Glaucoma (both ...
  A: I have a suspicion what was recommended was not exactly a regular CT scan, but rather scanning laser ...
optometrist or ophthalmologist for OCT test9/24/2009
  Q: I recently had my yearly eye exam by an optometrist. She has recommended that I have an OCT test ...
  A: There is nothing difficult in administering the OCT test. And the results provided can be ...
Progressives9/23/2009
  Q: I have been wearing progressive glasses for years with no problems. I recently had my yearly checkup ...
  A: Coatings should not make all that much difference. But in my experience, the BRAND of progressive ...
black eye9/23/2009
  Q: Johnston, I woke up this morning with a black eye? Under my eye and in the corner by the nose there ...
  A: This is a curious occurrence. But for me it does not signal the need for an emergency visit. Why ...
Bifocal Lenses9/23/2009
  Q: I am currently a college student wearing bifocals. I was wondering if it is a possibility to get ...
  A: Yes, I have often fit young people with bifocal contact lenses. It is not silly at all for the ...
Dim vision/loss of contrast9/22/2009
  Q: Johnston, My husband has been experiencing gradual vision loss, best described as dimness of vision ...
  A: Ok, the information you added this time helps me understand. There are two things I can suggest but ...
axis9/22/2009
  Q: In '07 I had an exam at Kaiser Hospital with an axis reading of OD 91 and OS 105. I wore glasses ...
  A: People can shift axis like that sometimes. Did you get the new glasses yet - and do they seem ok? ...
Irritable Eyes9/19/2009
  Q: I am a 55 year old male. I wear glasses for watching TV (long distance)Couple of years ago had a ...
  A: This is really hard to say without doing an exam, but from the fact that they have you doing lid ...
(Updated) Question on Prescription Problem9/19/2009
  Q: Dr. Placentra Johnston, I just had my eyes examined by a new eye dr (my old one isn't in the network ...
  A: My last suggestion: now that you know the problem is with the left eye, could you see ok with your ...
new prescription9/18/2009
  Q: driving etc ive had them for 3 days but seem to find myself squinting and if i close my better eye ...
  A: Please - go back to the doctor or optician and tell them of your experiences. There are two ...
Eye pains9/18/2009
  Q: please i need your help.My mum who is 54years old complains of slight pains in her eyes when she ...
  A: Your mom needs to visit an eye doctor. The symptoms you mention could be the result of inflammation ...
Is Equate multipurpose solution regulated by the FDA?9/16/2009
  Q: My eye doctor recently recommended that I use Opti Free multi purpose solution rather than Equate ...
  A: Yes, that is true in the sense that Equate is not a particular chemical formula. What the ...
eye problem9/16/2009
  Q: Dr. Johnston, My eyes water a lot. Sometimes, it also pains in the eyes. So I've to resort to eye ...
  A: It is difficult to say whether your eyes were damaged by viewing that solar eclipse back in 1995 ...
can i get my vision back9/16/2009
  Q: I sas stabbed in my eye abot 3 years ago and have very minimal vision out my left eye the doctors ...
  A: I am sorry to say that it is doubtful you could get your vision back from a corneal transplant, or ...
(Updated) Question on Prescription Problem9/15/2009
  Q: Dr. Placentra Johnston, I just had my eyes examined by a new eye dr (my old one isn't in the network ...
  A: Your contact lens prescription makes sense in view of the glasses Rx. However, the new contact lens ...
(Updated) Question on Prescription Problem9/14/2009
  Q: Dr. Placentra Johnston, I just had my eyes examined by a new eye dr (my old one isn't in the network ...
  A: It could be the axis shift in the reading eye. The left eye went from axis 50 to axis 40. But your ...
Chronic left eye irritation9/12/2009
  Q: 29 y/o Male with chronic left eye irritation. Perfect vision. No Problems with right eye. I did ...
  A: Without seeing you this will be difficult, but let me throw out some ideas: - the stringy strands ...
Pediatric vision therapy9/11/2009
  Q: My daughter's vision therapist comments that there is a lot of "instability" in her eyes. She says ...
  A: I honestly do not think the expander is likely to be contributing to the eyes being unstable. But ...
bruised eye feeling9/11/2009
  Q: I have a bruised eye feeling in my eye about a month ago, but it went away. Now its back. Do you ...
  A: Are your eyes light sensitive at those same times? If so, it could be a mild type of inflammation. ...
pigments on eye ball9/10/2009
  Q: my mother is 48 yrs hold and from last 3 years she is suffering from vision problems.i took her to ...
  A: I am wondering if your mother's diagnosis is what we call Retinitis Pigmentosa? That is what it ...
Monocular Diploia9/8/2009
  Q: What are some common causes of vertical monocular diplopia/polyopia that is apparent only when there ...
  A: Golly - you have got me! If you came into my office there is a whole bunch of tests I would do to ...
spot on eyelid9/8/2009
  Q: My husband has a small, white, hard lump on the outer corner of his eyelid. It isn't anything like ...
  A: There are three possibilities I can think of. 1) xanthelasma - this is a whitish lump on the ...
Vision Correction9/7/2009
  Q: I wear glasses and play basketball a lot, but the thing is I don't want to wear glasses when i play. ...
  A: Well, this is kind of outside my field of expertise (and interest) But the one thing I think those ...
Vision Correction9/7/2009
  Q: I wear glasses and play basketball a lot, but the thing is I don't want to wear glasses when i play. ...
  A: Ok, at -1.25 you might be able to reverse enough nearsightedness for basketball. -1.25 is really ...
dim vision9/6/2009
  Q: my grandmother is 99 years old!!! she is complaining of dim vision. she is deaf as well and reading ...
  A: Has she had a recent eye exam? If not, it could just be that she needs new glasses. The best one ...
Vision9/5/2009
  Q: "Hello, I am a contact lens wearer. I wear Acuvue Oyasys for Astigmatism and my current ...
  A: Some people with the same Rx can have wildly different actuity. Next time you are at the eye ...
Vision Correction9/5/2009
  Q: I wear glasses and play basketball a lot, but the thing is I don't want to wear glasses when i play. ...
  A: Not knowing how bad your eyes are, it is hard for me to tell you if there is a free, natural way to ...
Eyeglass prescription8/28/2009
  Q: What does "OD Slab Off" mean.
  A: If a person has a very different prescription in the right eye than the left, when they look down to ...
Residual images after I close my eyes8/28/2009
  Q: Approximately 1.5 seconds after I turn off the lights, I see a 1 cm, circular shaped, residual spot ...
  A: Hmm. The astigmatism would certainly not cause the symptom you now report. And, in defense of your ...
Contact lens problem8/27/2009
  Q: Good Day, I have been a contact lens wearer for about 2 years now and for the past 2 weeks in my ...
  A: It sounds like you have a textbook case of giant papillary conjunctivitis (GPC) Don't worry, it is ...
Eye glass material and coating verification8/27/2009
  Q: My wife and I recently had an eye exam and got new (very expensive) glasses. One of my wife's lenses ...
  A: I don't know how to tell you how YOU can verify the poly lens or the scratch coating. You can tell ...
Night Vision8/27/2009
  Q: I am 19 and have been wearing contact lenses for about 5 years. When I first started wearing ...
  A: Without doing your exam I cannot know for sure if this -0.25 over-correction will help at all. ...
crvo8/26/2009
  Q: i have this in right eye ,its very blur always.i had lazer treat as well,but i find still after 9 ...
  A: Hmm. Well if you had laser treatment and it has not gotten better, about the only thing you can do ...
vision8/26/2009
  Q: Please bear with me as my problem seems a bit weird. I am 21 years old and I have had a bad case of ...
  A: Let's rule one thing out right away: you said the condition gets better and then gets worse. Did ...
glaucoma8/26/2009
  Q: I will be thankful to you if you answer my question. Respectfully yours, Naseem (glaucoma patient ) ...
  A: Management of acute angle closure glaucoma requires more than just a single medication and must be ...
Eye floaters getting worse but doctors say it's normal8/25/2009
  Q: About a year ago I was going through a lot of stress and starting experiencing different problems ...
  A: Floaters can be extremely annoying, and for some reason seem to be more bothersome when the person ...
Essential Oil in Eye8/24/2009
  Q: I got a drop of chamomile essential oil that was not diluted in my eye. I flushed my eye with water ...
  A: If your vision is normal in that eye, the white part is not too red and the eye is no more sensitive ...
Renu Fresh Lens Comfort8/24/2009
  Q: Do you know if anything was actually in the formula changed when Renu labeled its solution as Fresh ...
  A: Interesting question. The B&L sales rep has not gotten to me yet about this so I have not heard ...
amblyopia8/23/2009
  Q: I apologize if this gets long, I want to give you a little background but will try to keep it short. ...
  A: First let me ask you to check with that first doctor as to whether the particular form of high index ...
eye8/21/2009
  Q: i dont know how to describe it isee a black shadow in my eye is this serious its a black shadow i ...
  A: Ok, at least now you have an answer. But did he say anything about why there was blood? Are you ...
Myopia8/21/2009
  Q: I am 17 years old before 3 months i suffered symptoms of myopia. I was tested before and didnt have ...
  A: Yes, there is a "tiny bit" of chance you can get rid of your myopia, but it will most likely not be ...
glaucoma8/21/2009
  Q: I will be thankful to you if you answer my questions. Respectfully yours, Naseem (glaucoma patient) ...
  A: Wow - these are some in-depth questions. Some have no exact answer but I will do my best to give you ...
eye8/20/2009
  Q: i dont know how to describe it isee a black shadow in my eye is this serious its a black shadow i ...
  A: Let's see, now I have a bit more information. It just started today and looks like a black jelly ...
eye8/20/2009
  Q: i dont know how to describe it isee a black shadow in my eye is this serious its a black shadow i ...
  A: If you have a black shadow in just one eye that was not there before, you must be seen by an eye ...
Dizzy, cross eyed feeling in new glasses8/20/2009
  Q: Just got 2 new pairs of glasses due to a scratched up lens in my pair that I bought in 2008. I went ...
  A: The difference between the two prescriptions is not that large. For that reason I suspect a problem ...
vision disturbances in 10 year old8/19/2009
  Q: I need advice on who I should possibly see to address a problem my 10year old son is having with his ...
  A: Since this whole problem began while he was under anxiety, there is some chance it is related to ...
vision8/19/2009
  Q: Please bear with me as my problem seems a bit weird. I am 21 years old and I have had a bad case of ...
  A: Are you a student by any chance? If you are reading and using a computer a really, really lot and ...
EYE BURN8/19/2009
  Q: WHY DO MY EYES BURN AFTER I TAKE MY CONTACTS OUT AT NIGHT
  A: I assume you are wearing soft contact lenses? Either way, the most likely explanation is that your ...
New sunglasses causing nausea8/18/2009
  Q: I bought a good quality sunglasses recently. I had eye examination and these lenses were made as ...
  A: There are many possible reasons for this. Some are related to possible human error (they got the ...
glasses8/18/2009
  Q: i have 2 pairs of glasses bought at the same time and should be the same prescription, the problem ...
  A: In general tinting does not affect the way the optics work. the Rx does not need to be adjusted to ...
swollen, red eye with pain8/17/2009
  Q: i'm 28 years old and on Wednesday evening my mom mentioned that my left eye was a bit red, in the ...
  A: This sounds a little bit worse than an allergy. It could be an infection but could also be some ...
Omega 3 supplements for blepharitis8/17/2009
  Q: I was diagnosed with blepharitis a couple of years ago. The treatment was warm compresses, cleaning ...
  A: Certainly any one thing you do to control your blepharitis is more effective than doing nothing. ...
eye focus8/17/2009
  Q: Each of my eyes in turn seems to be in focus, but when I look through both eyes at the same time, it ...
  A: If your eyes have always been that way, it is probably normal for you. Many of us have what is ...
red burning eyes8/16/2009
  Q: i have been working and using a soldering machine most of the day and my eyes are red and burning. ...
  A: You really need to see an eye doctor. Not only can an eye doctor determine if there is any actual ...
Issues wearing eyeglasses8/16/2009
  Q: I have been wearing glasses since 40 as a lot of us have. I have always had issues with my right eye ...
  A: Well, thanks for the comment. I hope at least one of my suggestions helps you. I would imagine ...
vision therapy8/16/2009
  Q: I have a friend in mid 50's who was born with crossed eyes. He had 2 muscle resection/recession ...
  A: After his surgery your friend most likely had a program of eye exercises designed to strengthen the ...
confusing prescription8/15/2009
  Q: I have had an eye test and my prescription is as follows R eye, sph -1.00 cyl +.50 axis 85 L eye, ...
  A: No, I certainly do not think you should wear this prescription all the time. You should see fine ...
confusing prescription8/15/2009
  Q: I have had an eye test and my prescription is as follows R eye, sph -1.00 cyl +.50 axis 85 L eye, ...
  A: Good pick up on the differenc in your Rx! Here in the US, for the most part, optometrists write ...
was flashed by brights 7 days ago, dazzle, light sensitive, and eye pain/strain8/15/2009
  Q: I'm hoping you can give me some reassurance... in short: was flashed by brights 7 days ago, dazzle, ...
  A: Limiting light to that eye is a good thing, until you can be seen medically, hopefully early next ...
Issues wearing eyeglasses8/15/2009
  Q: I have been wearing glasses since 40 as a lot of us have. I have always had issues with my right eye ...
  A: Well, that is a mystery. Let me throw out a few possible explanations though. 1) are the safety ...
was flashed by brights 7 days ago, dazzle, light sensitive, and eye pain/strain8/14/2009
  Q: I'm hoping you can give me some reassurance... in short: was flashed by brights 7 days ago, dazzle, ...
  A: The main thing I have to say to you is that you need to be evaluated by a professional. Your ...
First prescription glasses not helping with eye strain8/12/2009
  Q: I work with computers daily for long periods of time and have carefully set up appropriate lighting ...
  A: Well, first off, the way you wrote out your prescription for me, it looks like your right eye is ...
Exercise after surgery8/11/2009
  Q: I had surgery for a complete retinal detachment exactly 3 weeks ago. At my last appointment, a week ...
  A: I am a little uncomfortable with you lifting weights unless your surgeon specifically okays it. I ...
high myopia8/11/2009
  Q: what exactly is myopic disc? please explain in detail as i cant find any information online on the ...
  A: The optic disc is the spot in the back of the eye where all the nerves of the retina which are ...
Black Spot in eye8/10/2009
  Q: I am a 25 year old male. I just came back from a vacation in Florida where I first noticed a dark ...
  A: If you saw the optometrist AFTER the spot showed up and she did a careful dilated exam and the spot ...
Eyes8/7/2009
  Q: My husband has what looks like a white spec on the iris of his left eye. He said his eye has been ...
  A: When you say the white speck is on the iris, I am wondering if perhaps you mean it is on the cornea. ...
Flashing in peripheral field, shadows. Should I be concerned?8/7/2009
  Q: I've recently started experiencing unusual visual phenomena that I would like to attribute to ...
  A: You should definitely see an eye doctor, hopefully tomorrow! Some of your symptoms are suggestive ...
glasses Rx different than contact Rx in O.D. only8/7/2009
  Q: I just got back from a new eye doctor and gave me a prescription for glasses that does not match the ...
  A: The reason he didn't do what we call "vertex" the prescription in the left eye is because we don't ...
Clear Care8/6/2009
  Q: I accidently put Clear Care instead of Optifree in a flat contact lens case prior to taking a nap. ...
  A: ???? Your optometrist said there is nothing they can do???? Did you hear that from the doctor or ...
contacts with prism8/6/2009
  Q: I have a cousin who has prism in each lense of her glasses, she also has quite a bit of ...
  A: No, I am sorry it is not possible to put specific prism amounts into contact lenses. Or I should ...
swim goggles8/5/2009
  Q: i work as a lifeguard at an apartment complex. we provide swim goggles to the children who do not ...
  A: This is an excellent and interesting question - but I have to say that it might better be posed to ...
one eye smaller than the other8/5/2009
  Q: . i had conjuctivitis in march and was given vigamox. four months later, and after consulting 3 ...
  A: Ok, so what you mean is the left eyelid is very swollen and that makes the left eye "look" smaller ...
Eye tremors/styes8/5/2009
  Q: Since the end of the spring I've been experiencing an odd tickling feeling at the outside corners of ...
  A: Yes, it could be caused by an allergy or blepharitis, but I am betting on "something else." ...
RGP CONTACT LENSES8/3/2009
  Q: I have kerataconus and have been wearing RGP lenses for about 15 years. I have never had a problem ...
  A: I used to see this fairly commonly in RGP wearers. Questions to consider are: 1) might you have ...
Rings while looking at llights8/1/2009
  Q: I have been dealing with Corneal Erosion in my left eye. I have had the debridment done and am now ...
  A: I wish I knew how long it has been since your debridment. You really need to go back to your eye ...
marks on contacts8/1/2009
  Q: I have noticed small marks on my Acuvue Oasys for Astigmatism lenses. Do these mean anything? Are ...
  A: They are not really for you, but for the doctor - to tell if the axis on the contact lens is lining ...
Clear Care7/31/2009
  Q: What is your opinion of Clear Care solution? After having been told that it cleans better than ...
  A: Axis has no bearing on the POWER of your prescription. It is an indication of the POSITION on the ...
New glasses distortion7/31/2009
  Q: I recently had a checkup and ordered new wrap-around safety glasses. I'm 56, male, and my ...
  A: Problems like this can arise if they change the material of the lens ( say from CR-39, which is a ...
Clear Care7/30/2009
  Q: What is your opinion of Clear Care solution? After having been told that it cleans better than ...
  A: A person should definitely wait until their Rx has stabilized before having LASIK. After explaining ...
Clear Care7/30/2009
  Q: What is your opinion of Clear Care solution? After having been told that it cleans better than ...
  A: Clear Care is the only true no-rub solution. It does clean "better" than the others because it is a ...
Blurred Vision7/30/2009
  Q: Good Morning: I have been experiencing a "wave" in my left eye. It comes and goes. It can last ...
  A: I strongly suggest you go get a regular eye exam. It could be fluorescent lights that trigger that ...
physiological anisocoria7/29/2009
  Q: my 8 month old baby was dx with physiological anisocoria and i wanted what causes it and does it ...
  A: Yes, if it was an eye specialist - Ophthalmologist or optometrist - who dilated the eyes and ...
spots7/29/2009
  Q: this is a question i have about my 7 yr old daughter. she has greyish spots on the white part of her ...
  A: It would help here if I knew your race. I know that sounds strange, but African Americans and other ...
physiological anisocoria7/29/2009
  Q: my 8 month old baby was dx with physiological anisocoria and i wanted what causes it and does it ...
  A: When they use the term "physiological" anisocoria, it generally means they have gone to the trouble ...
Pachs Test7/28/2009
  Q: Can you please tell me why you perform a Pachs test and what is involved in performing this test. ...
  A: I believe you are referring to pachymetry. This measures the thickness of one's cornea. There are ...
Migraine and focus problem7/28/2009
  Q: I have a long history of migraine with aura. Last couple of years, I've been experiencing ...
  A: First of all, the most common type of double vision IS when one image comes from each eye - so when ...
Presbyopia7/27/2009
  Q: I am 49 years old. Since needing progressives, I have always worn Varilux Comfort Lenses. I take ...
  A: I have not used the Definity lens very much, but inherently have less confidence in it's optics than ...
one more thing7/26/2009
  Q: I have been strugglin with my prescription for a couple years. Actually three years ago i got the ...
  A: I am sorry, I should have clarified that a little bit better. Most people do not start needing a ...
BEST BET?7/25/2009
  Q: I have been strugglin with my prescription for a couple years. Actually three years ago i got the ...
  A: Ha! I saw the "Hi Dr. Shroff" in the first e-mail, but planned to answer anyway. Until I read the ...
a circle of flashing lights in front of my left eye7/24/2009
  Q: About an hour ago I noticed a circle of moving lights to the left of center in my left eye. I could ...
  A: Despite your not having a headache, this sounds most like an ophthalmic migraine. They often occur ...
Professional or "drugstore" eyeglasses7/21/2009
  Q: As a 38 year old woman, I've recently begun having trouble with seeing reading materials clearly as ...
  A: Here is my standard answer about drug store readers: If your prescription is about equal in both ...
one bloodshot eye7/21/2009
  Q: , I have been diagnosed with dry eyes by 2 different Dr.s and am wondering if I have a problem that ...
  A: If you had a complete exam, and your doctor has adequately ruled out a health problem inside your ...
Do you think I have an eye infection?7/19/2009
  Q: I am 25 years old with no health problems. I have been wearing -4.00 in both eyes for about 5 ...
  A: No, it is most unlikely that you have an infection. But any time an eye is subjected to insult, a ...
Eye vision and computer problems7/19/2009
  Q: I do most of my work on the computer. I am a very computer-type person. i'm about to get a very ...
  A: The larger screen is not going to put more strain on your eyes than a smaller one. But, a larger ...
IOCLs7/19/2009
  Q: Can IOCLs (or IOLs) ever be replaced, or are they a "one time only" surgery? Does it matter that I ...
  A: An IOL (intraocular lens) is the lens they normally implant in just about everyone who gets cataract ...
red blood vessels in eye7/18/2009
  Q: Yesterday afternoon I noticed that the left corner of my left eye was red. I looked closer and ...
  A: A red, sore eye should be seen by an eye doctor to at least get an idea what might be causing it. ...
burning in eyes7/17/2009
  Q: I have worn contacts for 15 years (I'm 32), and disposable over night ones for the last 5 years. ...
  A: There is obviously something very wrong. You absolutely must NOT sleep in contact lenses again ...
eye axis7/17/2009
  Q: My prescription reads an axis of 157 for distance (OD) and a 185 for OS. I've been told the 185 is ...
  A: This really does not make any sense. It sounds like the secretary does not know what she is talking ...
eye axis7/16/2009
  Q: My prescription reads an axis of 157 for distance (OD) and a 185 for OS. I've been told the 185 is ...
  A: I have never known of an eye doctor to write an Rx with an axis of 185. Technically it means the ...
Irritation due to contact lens7/16/2009
  Q: I used to wear contacts for 2-3 years with Renu solution, but slowly and slowly I've got ...
  A: Of course, the problem could be something other than the solution, so if changing the solution does ...
Blurred vision after bending over.7/15/2009
  Q: I'm 48 years old, always have had fantastic vision. Recently while working in the garden I stood up ...
  A: This is strange the way you described it. If it happened only once, I would go get that eye exam ...
Do I need progressive lenses?7/13/2009
  Q: I have recently begun to have problems with focusing on objects that are close to me [within two ...
  A: For exactly the reasons you describe I am always hesitant to prescribe progressives as a patient's ...
brown ring around the iris of baby7/13/2009
  Q: my baby girl is 6 months old,and she has developed a brown ring around the pupil in both eyes.she ...
  A: I am having a hard time picturing a brown ring around the pupil. Is the ring on the iris? What ...
going into optometry profession.7/12/2009
  Q: I am becoming a sophomore this fall at university of Illinois at Chicago. I am majoring in ...
  A: This has been a very great profession for me. One reason is my skills and interests match the ...
transparent animal7/12/2009
  Q: I am a 17-year-old boy. I sometimes can see transparent animals clearly on my vision, such as ...
  A: I suppose by "animals" you mean something like an amoeba as you would see it in the microscope? ...
glaucoma7/11/2009
  Q: My eyesight is good. From four months continuously I am feeling that there is a heavy transparent ...
  A: Wow! Your pressure was 40 in the left - that IS high. I am glad you are getting the pressure under ...
black pigment7/10/2009
  Q: I have a son who has a black pigment inside his eye over the right area at his right eye.I'm very ...
  A: I presume you mean the black pigment is on the white part of his eye, right? Whether this is a ...
didn't know how to reply to your response7/9/2009
  Q: I wrote you with the squiggly worm vision I was getting when I shaved my armpit. And, I thank you ...
  A: You contacted me the right way - just send a follow-up question. I don't think what you have is ...
8 month old baby7/9/2009
  Q: white puss like line forming around my babys right eye lens. it was just a small spot but now its ...
  A: I HOPE you have seen the doctor about this. But if not, that is the FIRST thing you must do! The ...
prescription changes7/7/2009
  Q: I had an eye exam two years ago that gave me the following prescriptions: Contacts R-3.00 L-3.25 and ...
  A: I am sorry you are having this difficulty but can clearly understand how it could happen. ...
Adult eye color change7/2/2009
  Q: I have just turned 30 and in the past year, my eyes have changed from blue (which would occasionally ...
  A: Hmmm. To tell you the truth, I don't know the answer to this. I believe a frank eye color change ...
eye injury7/2/2009
  Q: Dr. Johnston, About 6 weeks ago I had an eye injury where I got poked in the eye with a tree branch. ...
  A: Yes, there is such a thing as corneal erosion that can happen long after a corneal injury. This is ...
Floaters6/30/2009
  Q: I have always noticed my eye floaters for years now I am 21. It seems like I have received a little ...
  A: Anyone who notices or suspects an increase in floaters should have a dilated eye exam to be sure ...
pressure behind brow bone, etc...6/30/2009
  Q: ..I can't find an experet in the sinus related field but thought you may be able to help. I have ...
  A: Could the vasoconstrictors in the eye drops cause high blood pressure, too ? NO. Not likely - ...
pressure behind brow bone, etc...6/29/2009
  Q: ..I can't find an experet in the sinus related field but thought you may be able to help. I have ...
  A: I must admit, I had never heard of ROHTO-V eye drops until you mentioned them. I quickly googled ...
pressure behind brow bone, etc...6/29/2009
  Q: ..I can't find an experet in the sinus related field but thought you may be able to help. I have ...
  A: I cannot speak to all the rest of your problems. I do hope you find an answer. But please rest ...
pressure behind brow bone, etc...6/29/2009
  Q: ..I can't find an experet in the sinus related field but thought you may be able to help. I have ...
  A: Well, that is quite a situation you have there. I assume the CT and EEG were done BECAUSE of the ...
ABOUT EYE POWER IN MEDICAL TERMINOLOGY6/28/2009
  Q: I am 22yrs old male.I have applied for a job with a company.In the application form there is ...
  A: The numbers you list correspond to the 20/20 notation we use in the US. They refer to what distance ...
Clear lens glasses6/27/2009
  Q: I used to be myopic and took laser surgery. Now my vision becomes normal and I can see things really ...
  A: Uv protection does not have any color to it, so though the lenses are clear, they may indeed have UV ...
colored contacts6/26/2009
  Q: I just received my box of colored contacts from my optomologist and had a few questions. I usually ...
  A: People switching to colored contact lenses often notice this blur peripherally that arises from the ...
Neovascularization6/25/2009
  Q: Margaret Johnston I have been wearing contact lenses (1-day lenses) for 6 years without any ...
  A: I can't tell you exactly how long your eyes have to suffer lack of O2 before the neov. forms or ...
Eye goo!6/25/2009
  Q: What is the clear goo that i pull out of my eyes sometimes? It comes out in long strings. Before i ...
  A: These are classic symptoms of ocular allergy. Your eye doctor can prescribe some very good drops to ...
Puffy Eye Lids6/25/2009
  Q: I am a 44 year old woman who just had Gyn surgery and woke with swollen eye lids. Well the surgery ...
  A: Well, I do not know if there is any connection with the gyn surgery. Are you sure the problem is ...
Neovascularization6/25/2009
  Q: Margaret Johnston I have been wearing contact lenses (1-day lenses) for 6 years without any ...
  A: I can understand your concern about the neovascularization. I was a little bit confused about the ...
Left Eye6/23/2009
  Q: i bang the top of my eye playing football in a head clash.. my eye cut swelled up and bruised.. i ...
  A: Hmm. This is a tough one. Did they x-ray or do any kind of scan to find out if any orbital bones ...
Contact lenses6/23/2009
  Q: How long should I wait after waking up in the morning to put in contact lenses? Are soft contact ...
  A: While waiting a while to put your contact lenses in after getting up is not mandatory, I have always ...
Prescriptions6/22/2009
  Q: First, thank you for doing this...it's a really nice thing to do and it helps so many people find ...
  A: Your "figuring out" what power of glasses would give you 20/40 or 20/30 would be of no real use ...
Red line in eye.6/22/2009
  Q: A while ago, I became aware of a thin red line running from the inner corner of my right eye ...
  A: Ok, I did think you would need at least a week to tell if the tears were helping. And I was not as ...
Changes in Base Curve6/21/2009
  Q: I recently went to eye doctor for my annual visit and b/c I noticed my vision was changing again ...
  A: It is not terribly common for the base curve to "change." Choice of base curve is usually based on ...
Nose pads6/20/2009
  Q: I had new nose pads put on and they don't move. They readjusted glasses for me, nose pads are little ...
  A: This depends on how they are mounted. The silicone pads with a little bump on them that fits into a ...
Red line in eye.6/20/2009
  Q: A while ago, I became aware of a thin red line running from the inner corner of my right eye ...
  A: I am so sorry that being uninsured is preventing you from seeing a doctor when you need one. This ...
my son was diagnosed as farsighted6/20/2009
  Q: The optometrist said that our son is extermely farsighted. He is 8.5 months old and is +10 in rt ...
  A: Yes, I believe your son does need glasses. While young children are often farsighted, +10 and +12 ...
eyelid twitching6/19/2009
  Q: my left eyelid [upper] has been twitching for a month. Some days seem worse than others and when it ...
  A: A lid twitching is called myokymia. I sort of doubt it is an official case of blepharospasm as this ...
Possible Eye Problem6/18/2009
  Q: Johnston, My right eye seems to be constantly vibrating, when I close my eyes and put my finger ...
  A: I am sorry. I really cannot imagine what "random bursts of bubbling sensation" would be. I would ...
Eye Flashes6/18/2009
  Q: I occasionally get this flashy thing in my eye, it starts out a little spot where i cant see and it ...
  A: The symptoms you describe are very compatible with the diagnosis of migraine. But with the ...
contact lens/red eyes/inflammation6/16/2009
  Q: I've been wearing contacts for 18 years (gas permeable the first 9 years, and 2 week disposable ...
  A: Has anyone recommended you try a different contact lens solution yet?? The symptoms you report ...
Conductive Keratoplasty6/16/2009
  Q: my name is Jon, and I was wondering if optometrists could perform conductive keratoplasty? ANSWER: ...
  A: This is a very good argument in favor of allowing OD's to do this procedure. I do not know if the ...
Inability to Correct Eyesight6/15/2009
  Q: I'm 26 years old. I need to be corrected to 20/20 distant visual acuity in each eye in order to get ...
  A: I can feel your frustration in being so close to your goal, but unable to achieve it. Large ...
Eyesight6/15/2009
  Q: My vision has gone blurry in one eye (right) when i look at objects over approximately 12 metres ...
  A: If you notice a difference in your vision from what it was before, you should have an eye exam. ...
Reddish/brown dot on iris6/14/2009
  Q: I was looking closely in the mirror today and I noticed a tiny reddish/brown dot on my left iris. ...
  A: Well, the dot could have been there in the past and you didn't notice it. If your mother is alive, ...
Conductive Keratoplasty6/14/2009
  Q: my name is Jon, and I was wondering if optometrists could perform conductive keratoplasty?
  A: No, conductive keratoplasty (CK) is a surgical procedure. In general Optometrists do not do ...
Contacts and swimming?6/14/2009
  Q: Johnston, Summer is coming up and I was just wondering if it's okay to swim in contacts? I don't ...
  A: The official answer is that it is absolutely NOT ok to swim in contact lenses. Whether in the ocean ...
Cornea6/13/2009
  Q: I have itchy eyelids and have been scratching my right lower and upper lids lately. At work ...
  A: Sorry I didn't get to your answer until the weekend was almost over! By now, either your eye has ...
white sticky goo6/13/2009
  Q: were I have during the whole day a glob of white sticky goo coming out of my eyes, my eyes burn and ...
  A: When you say you hate the sun, this does not tell me if your eyes are what we call light sensitive. ...
shadowy colored spot on white of eye6/12/2009
  Q: My 4 year old daughter has a "spot" the size of the tip of a pencil on the white of her eye. It is ...
  A: "Blood shot" generally means the tiny blood vessels that are normally so thin you can't see them ...
Aaahstigmatism6/12/2009
  Q: I just got new glasses off an older prescription, and after wearing them for four days, things ...
  A: Occasionally this happens when someone is not used to astigmatism correction. When you say it was ...
swollen optic nerves6/11/2009
  Q: I have a 5 year old daughter that has had a lot of symptoms for the last four weeks, and has been to ...
  A: Well, one might ask what did the ophthalmologist who saw the swollen optic nerves recommend? This ...
shadowy colored spot on white of eye6/11/2009
  Q: My 4 year old daughter has a "spot" the size of the tip of a pencil on the white of her eye. It is ...
  A: First of all, while it would have been better if she had worn sunglasses in Hawaii (and wherever you ...
Reading Glasses6/10/2009
  Q: Johnson, I am 49 years old and have astigmatism. The past few years I have needed to hold books and ...
  A: Although it may seem to you that the glasses are making your eyes weak, it is really just the ...
dark dot in iris6/9/2009
  Q: I was just curious as to why my partner has a dark dot in his right iris. He has had it for his ...
  A: Ok, that is a little bit different. The same explanation may apply - BUT there is slightly greater ...
my Rx from the doctor6/8/2009
  Q: I am a 48 year old female and had an eye exam. This is what was wrote on a Rx for me. ...
  A: This means you are slightly far-sighted for distance vision but probably think you see fine without ...
dark dot in iris6/8/2009
  Q: I was just curious as to why my partner has a dark dot in his right iris. He has had it for his ...
  A: I assume you mean there is a dark spot on the white part of his eye? This is fairly common, ...
Flashing light in my peripheral6/8/2009
  Q: I recently started experiencing a flash of light in the peripheral of my left eye. It is ...
  A: Please make an appointment immediately with an eye doctor for a dilated eye exam. A flashing light ...
eye question6/6/2009
  Q: Slight right eye discomforts started about a week ago. Feeling a little cloudy on the eye, when I ...
  A: Have you seen any flashing lights - especially while moving your head back and forth? Or is there a ...
Do I need to get glasses?6/5/2009
  Q: I am 18 and took a trip to the optometrist before going to college because my parents said I ...
  A: I am sorry. I thought I answered this one. In fact I know I did answer it. But for some reason ...
prescriptions6/5/2009
  Q: I grew up in the U.S. and have worn contacts for over 20 years. My correction prescription was told ...
  A: I am certain that your Rx in the US was -4.00 and not -400. There is basically no such thing as an ...
Do I need to get glasses?6/5/2009
  Q: I am 18 and took a trip to the optometrist before going to college because my parents said I ...
  A: If you are -2.00 in one eye and -1.50 in the other, I don't think you are going to be able to see ...
One lens reading - one distance - problems?6/4/2009
  Q: About seven years ago, aged 53, I started wearing soft contact lenses. My optician first tried me ...
  A: Styes are thought to sometimes be more likely when there is eyestrain. I am not sure what is ...
One lens reading - one distance - problems?6/4/2009
  Q: About seven years ago, aged 53, I started wearing soft contact lenses. My optician first tried me ...
  A: First of all, you should know the posterior vitreous detachment (PVD)is very common at your age. ...
wet sticky goo coming from eyes6/4/2009
  Q: I have sticky stuff coming from my eyes, mostly in the mornings but has happened during the day as ...
  A: Well, are the eyes itchy at all or red? Sticky goo is most likely due to allergy - especially if ...
Gas Perm Challenge6/3/2009
  Q: I recently got an updated prescription for gas perms. I wanted to order Hydro 02 lenses, but the ...
  A: Just like any drug, your contact lenses are supplied as a <b>prescription</b> item. If the online ...
EYE PROBLEM6/2/2009
  Q: I HAVE BEEN HAVING A VERY SERIOUS ISSUE WITH EYE FLOATERS AND IRRITATION IN MY EYE, (LIKE I HAVE ...
  A: You must see an eye doctor as soon as possible - as in today or tomorrow! While many instances of ...
Is this an eye problem?6/2/2009
  Q: I have a small yellowish growth on the left eyeball. There is no pain or anything but today is is ...
  A: I bet the small yellowish "growth" is just to the side of the colored part of your eye - either in ...
SUNGLASSES6/1/2009
  Q: What is the most common/frequent mistake we make with sunglasses (dark glasses)? The question does ...
  A: I really don't know how to answer this other than to say you bring up a good point. Just like ...
cleaning eyes going brown6/1/2009
  Q: I am a lady, 33 years of age, last year I started noticing that the white of my eyes was turning ...
  A: In most cases, when the whites of the eyes are turning brown it is just an accumulation of pigment. ...
edema behind retina5/31/2009
  Q: I recently had the OCT test at my yearly contact lens exam. The dr said I had some thickening or ...
  A: The vitreous gel detaching is not such a big problem and is very common, I am going to say in people ...
Axis Changing tremendously5/31/2009
  Q: I'm a 16 year old male. In 2007, My axis was 180 for both eyes (-4.75 for both) and i went to the ...
  A: I smiled at this as I realized how confusing our numbering system is, a "language" we in the field ...
Splotch in vision, appears and disappears5/30/2009
  Q: For several days I have noticed what looks like a splotch appearing in my vision (left eye), but it ...
  A: Are you seeing flashing lites at all - especially with a head turn? Is there any piece of your ...
fans5/30/2009
  Q: I have what looks like little black fans spinning around in front of my eyes.not like floaters. ...
  A: Sorry - I think I hit the wrong button so you may have gotten a note from me that was not an answer. ...
Contact Lens5/30/2009
  Q: Before I was diagnosed with astigmatism in my right eye, the prescription for my right eye was 2.25. ...
  A: What I think you mean is the spherical part of your prescription was 2.25 - undoubtedly MINUS 2.25. ...
Contact lense sticking due to high cylinder?5/29/2009
  Q: I am currently wearing Acuvue Advanced for Astigmatism contact lenses. My prescription in glasses ...
  A: In 27 years of practice, I have never heard of a ten degree axis shift making a difference in ...
use of xalatan for cosmetic purposes5/29/2009
  Q: I am a 53 yr. old female in good health (other than arthritis) and see a dermatologist (who ...
  A: I admire your caution about using prescription drugs for a cosmetic purpose. Xalatan, while a ...
Contact lense sticking due to high cylinder?5/28/2009
  Q: I am currently wearing Acuvue Advanced for Astigmatism contact lenses. My prescription in glasses ...
  A: Since you have been recently refit, I am assuming you are using a new box of contact lenses. It is ...
Eye Changes5/28/2009
  Q: - I had a test at opticians a month ago and percription changed slightly for the worse. I was ...
  A: Oho - now there is something I had not thought of. Hormone changes (from pregnancy, nursing or ...
Bump bye eye5/27/2009
  Q: I have a large hard bump between my eye and my nose right where my glasses sit on the left of my ...
  A: I really think you should at least go to see the ophthalmologist. It could be something that must ...
Eye Changes5/27/2009
  Q: - I had a test at opticians a month ago and percription changed slightly for the worse. I was ...
  A: I wish I knew your age because that would help me understand about your prescription change. It is ...
longsighted5/27/2009
  Q: my optician said i dont have to were them all the time if i dont want to, but i am finding my sight ...
  A: Wearing your glasses all the time will not make you eyes get better or worse. If they are going to, ...
tunnel vision5/26/2009
  Q: I have been having tunnel vision for the past 6 months...sometimes 2 times a week. I have had a ...
  A: I don't know what kind of eye exam you had but I do hope you told them about this problem at the ...
Itchy And Iritating Eyes Could It Be Caused Through Strees5/25/2009
  Q: Hello every now and then my eyes get really itchy red and irritating it happens when i get stressed ...
  A: I am so sorry. I answered this question several days ago but I now see that somehow my answer did ...
Swollen eye5/23/2009
  Q: My 5 year old son constantly has dark circles under both eyes, probably an unidentified ...
  A: Yes, it could be an allergy in just one eye. let's say he sleeps on one side all the time and the ...
Is my eye prescription changing too fast?5/23/2009
  Q: I am 25 years old with no health problems. I have been wearing -4.00 in both eyes for about 5 ...
  A: Yes, your math was correct ;-) But you may have a hard time finding +0.75's if you are just looking ...
Is my eye prescription changing too fast?5/23/2009
  Q: I am 25 years old with no health problems. I have been wearing -4.00 in both eyes for about 5 ...
  A: Let's see - you pretty much hit the nail on the head in your last paragraph. Once a person stops ...
Red irritated eyes5/22/2009
  Q: I have the exact simptoms and experiences as the person below reported, this was back in 2007. I ...
  A: Hmm. I don't know what tests were done to determine the corneal erosion, but since the Muro 128 did ...
Eye pain after a cataract surgery5/22/2009
  Q: My father underwent a cataract surgery approximately 26 days ago. He is 85 years old with some ...
  A: Well, let me say this. That much pain is not a typical problem after cataract surgery, even an ...
Eye ulcer?5/22/2009
  Q: About a month ago, my husband's eyelid became sore-thought it was a sty, but never came to a head. ...
  A: Ok, I am sorry. I have absolutely no experience treating thrush. It is not very common in the eye. ...
Cataract surgery5/21/2009
  Q: I had the surgery in both eyes, the doctor told me I had astigmatism in left eye so had toric lense ...
  A: There are a few things I would need to know to fully understand what happened here. Is the left eye ...
Eye ulcer?5/21/2009
  Q: About a month ago, my husband's eyelid became sore-thought it was a sty, but never came to a head. ...
  A: Well, I chose to "answer" this question, even though I am afraid I cannot give you a real answer as ...
CONTACT LENS5/20/2009
  Q: I SOMETIMES HAVE ADULL PAIN IN MY LEFT EYE. THE EXPERTS SAY I AM SHORT SIGHTED. IS THERE A WAY SHORT ...
  A: If the pain is related to your contact lens, it may be that the lens does not fit well. You should ...
transition lens5/20/2009
  Q: Is it possible to make my bifocal plastic lens to bifocal transition lens without getting a new pair ...
  A: I am sorry but no. The transitions treatment is an actual part of the lens itself, not something ...
blood in eye5/19/2009
  Q: I woke up about two mornings ago and had a red blood spot in the corner of my eye, i don't know ...
  A: More than likely that is what is called a subconjunctival hemorrhage. These are generally ...
my base curve5/19/2009
  Q: When I went to my optometrist last time, he gave me an exam for proclear compatibles contact lenses. ...
  A: The Oasys used to come in only one base curve, so it was not necessary to include the curve as part ...

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Ophthalmology & Optometry

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Dr. Margaret Placentra Johnston, OD

Top Expert on this page

Expertise

I can answer almost any question about vision and general eye health care. As a non-surgeon, I may not be able to answer very involved technical questions about surgical procedures or highly specialized medical treatments. As of March 10, 2010, I will no longer answer any questions about Clear Care. People who do not understand how to use it should contact their eye doctor directly for advice.

Experience

I hold the degree of Doctor of Optometry and was in full-time private practice for twenty-five years. Currently I have reduced my schedule to part-time to allow time to write a book on another topic.

Organizations
American Optometric Association, Virginia Optometric Association, Northern Virginia Optometric Society (and others unrelated to this topic)

Publications
Http://www.exploring-spiritual-development.com, http://www.BeliefStagesandGrowth.com

Education/Credentials
O.D. (Doctor of Optometry) Pennsylvania College of Optometry (now called Salus University,) B.S. Pennsylvania College of Optometry, M.A. (Education) Catholic University of America, B.A Catholic University of America.

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