What is Color Blindness?

Color blindness (also called color vision deficiency or CVD) is a reduced ability to see colors.

Someone who is color blind is technically not "blind" to colors, but may misidentify, confuse, fail to notice or notice colors less quickly than normal.

About 1 in 12 male and 1 in 200 females worldwide have congenital red-green color vision deficiency (CVD). An estimated 3-4% of the population has acquired blue-yellow CVD associated with an age-related low-vision disorder.

Protans have a red-green color vision deficiency caused by an anomaly in the red-sensitive retinal cone cells. Protans typically confuse between orange versus green, red versus black, blue versus purple, and light red (or "salmon") versus gray.

Deutans have a red-green color vision deficiency caused by an anomaly in the green-sensitive retinal cone cells. Deutans typically confuse shades of yellow versus green, green versus gray and magenta (or "pink") versus gray.

Tritans have a blue-yellow color vision deficiency caused by an anomaly of the blue-sensitive retinal cone cells. Tritans typically confuse shades of yellow versus gray and blue versus gray.

CVD is classified by type (protan, deutan or tritan) as well as the extent which can be mild, moderate or strong.

This test is not a medical diagnosis and has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. Results may vary depending on the color accuracy of your display. Please consult your eye care professional for more information about color vision deficiency.

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