color vision defects

Color blindness (color vision deficiency) is the decreased ability to see color or differences in color. It can impair such tasks as selecting ripe fruit, choosing clothing, and reading traffic lights. Color blindness may make some educational activities more difficult. However, problems are generally minor, and most color-blind people adapt. People with total color blindness (achromatopsia) may also have decreased visual acuity and be uncomfortable in bright environments.The most common cause of ...