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What causes colourblindness?

Updated: 8/16/2019
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10y ago

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Colorblindness is caused by an anatomical defect of the inner eye. If the eye lacks certain cones, the cells responsible for detecting and relaying colored light, the brain will not be able to perceive these particular colors, because there is a lack of informational input. Colorblindness has variances, such as red-green colorblindness, which is partial. However, in exceptionally rare cases, it is possible to lack cone cells altogether and be only able to see in black, white, and gray. This is called monochromism and accounts for an extremely small percentage of documented cases of colorblindness.
Being colorblind is if you cannot see any colors, like if you were able to see blue, red, green, yellow and so on and so forth, you can't see those colors. The only colors you could see are black and white.

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