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Biology/Eye Disease.

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Question
Dear Prof Walter

Are there eye diseases where the person is unable to view any colors except White and Black color?.  I. E. Red, Green, Blue, Yellow, Pink, Violet etc

If yes or no, What is the biological or Medical reason behind?.

Thanks
Prashant

Answer
I am unaware of any condition whereby humans see no color whatsoever but there is heditary color blindness whereby a person cannot distinguish between collors. It would be considered as a defect and not a disease. It is sex linked carried on the 23rd pair of chromosomes.  

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Walter Hintz

Expertise

Science teacher for over 50 years. MSc. in biology. I can answer questions in general biology, zoology, botany, anatomy and physiology and biochemistry.

Experience

I have a MSc in biology and have been a science teacher for over 50 years. At present I am a faculty member at a college and a science consultant at seven catholic schools.

Publications
The Ohio journal of Science
Momentum-The Journal of the Catholic Education Association

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