Color Blindness

Color Blindless

Color blindness is the inability to distinguish particular colors. It is generally an inherited trait, but can result from a chemical imbalance or eye injury. There are three primary colors. They are red, blue, and yellow. All other colors are the results of different combinations of primary colors.

Special visual cells, called cones, are respon-sible for our ability to see color. People with normal vision have three different types of cones, each responsible for a different primary color.

The absence of particular cones causes the absence of particular colors.

This can be one cause of color blindness. There are four types of color blindness. The rarest forms are mono-chromatism and a-typical monochromatism.

People with monochromatic vision, or total color blindness, has no cones at all.

As a result, they have no ability to see colors, and no hue discrimi-nation whatsoever. Monochromatic vision is very similar to watching a black and white television program.

Somebody with a-typical monochromatic vision has just one type of cone, and can see just one color, and various shades of that color. This form is even rarer than the "typical" monochro-matism.

Another, more common, form of color blindness is called dichromatism.

People with di-chromatic vision tend to confuse red, green, and gray, but can

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