How to Test for Color Blindness

Color blindness is a condition that affects more men than women, and it does not mean that the person can only see in black and white. Usually, a colorblind person only has trouble seeing a few colors or shades of colors, usually shades of the color green, blue or brown. Color blindness is hereditary, so if you have a family member who is colorblind, you are more likely also to be colorblind.

Things You'll Need

• an online color blindness test

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Instructions

• 1

  Obtain a test for color blindness online (See Reference 1.). Color-blindness tests are available for free on the internet, and although they should not be the ultimate diagnosis, it can give you an idea if you think you or someone you know could be colorblind.

• 2

  Read the corresponding questions on the online test and view the patterned pictures. Most color blindness tests are a series of pictures with multiple colors and patterns popping out through a background of another color. Refer to the answer key to see if you found all the shapes and patterns, or you can have a friend quiz you. Online tests can be taken in your home by viewing the pictures on the computer screen.

• 3

  Take note of which answers you get wrong, if any. These may be colors that you have trouble seeing.

• 4

  Bring the subject and the test results to an ophthalmologist. The doctor can further confirm the test results, give another test if necessary, and make an official diagnosis.