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A 38-year-old member asked:

why is my brother color blind when i'm not?

1 doctor answer1 doctor weighed in
Dr. Richard Bensinger
Ophthalmology 52 years experience
Are you female?: Color deficiency is most common in males as it is carried on the X chromosome. Your brother has an equal chance of getting one or the other X from your Mom and one of these had the deficient gene. If you are male, then you got the other one. If you are female then you might have one deficient X gene but your other, from your father, is normal.

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A 34-year-old member asked:

How do I know that my brother is not color blind?

2 doctor answers3 doctors weighed in
Dr. Tim Conrad
Ophthalmology 34 years experience
Have him tested: The best is to have an evaluation with an ophthalmolgist, but there are internet-based color vision tests that can determine this as well. Google "color vision test".

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Last updated Dec 6, 2014

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