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Color Blindness Essay

848 words - 3 pages

Color Blindness Many people refer to problems with one's ability to see color as color blindness, however, unless a person can't see any color at all, color vision problems should be called by another term. Common terms are abnormal color vision, color deficiency and color vision confusion. Females maybe be effected by color blindness, but usually they are just carriers. Males are more often affected. About 8% of males and 0.5% of females are effected by color blindness. Although color blindness may be a result of another eye disorder, the majority of color blind cases are hereditary and present at birth. The retina, is a complex nerve system which converts light energy into electrical energy that is then transmitted to the brain. This conversion is accomplished by two types of receptor cells in the retina called rods and cones do to their shape. The cones are responsible for converting the color. Each cone contains visual pigments that are sensitive to one of three wavelengths of light: red, green and blue. Normally, all colors of the spectrum are able to be matched by mixtures of only three color sensitivities. Therefore, the huge variety of colors we see are a response to different compositions of wavelengths of light. The rods are responsible for encoding white and black. Color blindness 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 color blindness, however, complete color blindness, or achromatopsia, is probably the simplest to understand. This is the rarest form of color blindness. 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 color blindness: 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,...

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