A 38-year-old member asked:
why is my brother color blind when i'm not?
1 doctor answer • 1 doctor weighed in
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.
3.5k viewsAnswered >2 years ago
A 34-year-old member asked:
How do I know that my brother is not color blind?
2 doctor answers • 3 doctors weighed in
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".
5.4k viewsAnswered >2 years ago
Last updated Dec 6, 2014
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
$30 per visit with
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.