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Types of Color Blindness

Color vision differences are grouped by which cone cells are affected. Each type changes which colors are hard to tell apart.

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Essential guide

What Is Deuteranopia?

Deuteranopia is a type of red-green color vision deficiency that makes certain reds, greens, browns, oranges, and purples harder to tell apart. Learn what causes deuteranopia, how it differs from deuteranomaly, what colors are most affected, common signs, and how deutan color vision is tested.

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