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Color Blindness


Updated June 10, 2014

Definition: Color blindness is the inability to identify colors in a normal way. Color blindness is a color vision deficiency that makes it difficult to impossible to perceive differences between some colors. Although color blindness is usually an inherited condition, it may also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals.

Color blindness is typically identified as either total or partial, with total color blindness being quite rare.

The two major types of color blindness are "red and green" and "blue and yellow." People affected with these types of color blindness have difficulty distinguishing between the two colors.

Color blindness is typically diagnosed by using the Ishihara color test.

Also Known As: Color Deficiency
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