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Shinobu Ishihara was the Japanese ophthalmologist who first developed the standard color blindness test. He found that by creating special placards covered with colored dots of many different colors, he could detect color blindness in some individuals.

This was done by portraying a number or other image within the matrix of dots that would be perceived by “normal” viewers but not by people with color vision deficiency.

This online test is a sophisticated review of his methods.

Also, watch out for the “reverse” color blindness test that is included!

Ishihara Test Color Deficiency

Related posts:

1. New Test: Color Vision Test
2. New Test: Color Blindness
3. New Test: Color Blind Test
4. New Test Category: Color Blind Tests
5. Aura Color Test – same as your favorite color?

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