Color Blindness

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for encoding white and black.
results when one or more of the cone cells fail to function properly. One of the visual pigments may be functioning abnormally, or be absent altogether.
There are several different types of , however, complete , or achromatopsia, is probably the simplest to understand. This is the rarest form of . This is when no colors can be seen at all. The color receptors are almost completely gone in this form, however, the white and black receptors remain intact. However, this condition is often misdiagnosed without proper testing.
There are three basic types of : deuteranopia, protanopia and tritanopia. Deuteranopia is a condition in which people have trouble dealing with green. These people are one of the largest groups of color blind people. Very often, these people also have a problem with red. These people can often distinguish red or green when with other colors, but when it is by itself, it is very difficult. Many people will just see it as ...

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