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Color Vision Deficiency (Color Blindness)

Color Vision Deficiency (CVD) is the inability to distinguish between some colors and shades. Most people with this condition can identify some colors. Few people are totally "color blind." Color filters, such as a special red contact lens worn on one eye or prescription glasses may be used to help some people with a color deficiency. In addition, talking products are available that will scan a color and announce a description of the color (originally designed for individuals who are blind).


The use of color contrast overlays may increase the legibility of a paper document, allowing the reader to more easily discern either printed images or words