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About Amy
Expertise
I love understanding how things work, especially when it comes to living things. I`ve spent most of my life studying science and love passing on this knowledge to kids. I currently work in a children`s science museum where I`ve designed science exhibits on all sorts of topics; including predators, music, weather, water, technology and much, much more! I`m happy to answer questions about anything you have problems with at school or help you with science projects. Also, I can help teachers with ideas for classroom activities. Please note that I don`t answer homework questions.

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I have an honours degree in Biochemistry and work as a science communicator for the National Science and Technology Centre in Australia.

 
   

You are here:  Experts > Science > Science/Nature for Kids > Science for Kids > Optical illusions

Science for Kids - Optical illusions


Expert: Amy - 1/16/2005

Question
I'm in grade 10.  Anyways, how do those 3D optical illusion work.  The ones that just look like patterns on the page, and then you kind of cross your eyes and you can see a 3D image made of the pattern... yeah, thanks for any help answering!

Answer
Hi Andrea,
this is how those optical illusions work. BTW their real name is random dot stereograms. They rely on our tricking our ability to see objects around us in 3D.

I think the best way of understanding them is to look at pictures and unfortunately I can't put them in these answers.so...here's my favourite websites on how random dot stereograms work.
None of these websites give all the information, so you'll have to read them all to get the best understanding.

Start off with how we see things in 3D

basic information on stereo (3D) vision
http://www.vision3d.com/stereo.html

how they make random dot stereograms
http://www.magiceye.com/faq.htm

how to look at random dot stereograms
http://www.vision3d.com/3views.html

happy reading!

Thanks,
Amy


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