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A 21-year-old male asked:

i took ishihara plate test on internet and it shows that i have red color blind (protanopia). what can cause it, and what can be done about it?

1 doctor answer2 doctors weighed in
Dr. David Miller
Dr. David Miller answered
Family Medicine 10 years experience
Genetics: Color vision is controlled by a gene on the x-chromosome. Females xx and males xy, making males more likely to be color blind. Of the different types, red/green is the most common, with red being a sub-type of this. You should see an ophthalmologist for an evaluation. If you are just now discovering this, it seems like you are pretty well adapted to your situation.

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Similar questions

A 40-year-old member asked:

Can you fly a plane if you are color blind?

2 doctor answers2 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Yes: A pilot in the U.S. Is allowed to fly planes even if he is color blind, but he has 2 restrictions on his license. His license will say "not valid for night flying or by color signal control". Color signal control is when the control tower flashes red, green, or white lights at the pilot to give him instructions when the radios are not working, which rarely happens.
CA
A 25-year-old member asked:

How come some people are color blind and some people are not?

3 doctor answers7 doctors weighed in
Dr. Daniel Goldberg
Specializes in Ophthalmology
Color Blindness: Color blindness is a manifestation of a wide array of diagnoses. It may be inherited as in x-linked color blindness (affecting males only) or acquired as in optic neuropathy. A long list of abnormal genetic diseases may cause color blindness including achromatopsia and others. Some forms of color blindness are relative and some are absolute where the patient only sees shades of gray.
A 24-year-old member asked:

What makes a person color blind?

3 doctor answers6 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
A genetic mutation: A person is born color blind because he has a mutation in the genes that are needed to see certain colors the way a normal person sees colors. Most color blind people can see many colors, but the colors appear in a "different" hue, compared with how the colors appear to a normal person. Very rarely does anyone have total color blindness and see only black, white, and gray.
A 47-year-old member asked:

Can you regain the ability to see color if you are color blind?

3 doctor answers6 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
No: Several varieties of color blindness exist, but they are permanent conditions. A person is born color blind because he has a mutation in the genes that are needed to see certain colors the way a normal person sees them. Most color blind people see many colors, but the colors appear in a "different" hue. Very rarely does anyone have total color blindness and see only black, white, and gray.
CA
A 42-year-old member asked:

How can you determine whether you are color blind or not?

2 doctor answers2 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Do the Ishihara test: A person can determine if he is color blind by taking the ishihara test. This test consists of 38 circles of colored dots. Each of the circles of dots contains a hidden number made up of certain colors of dots. Depending on whether or not a person can read the number in the circles, his type of color blindness can be diagnosed. Parts of the ishihara test are posted on websites for people to use.

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Last updated Nov 28, 2017

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