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Color Blindness was discovered in 1778 by John Dalton. Dalton was a Quaker so because he couldn't see red well, he sometimes bought red clothing for family members and wore red. This offended other Quakers where he lived.

About The Discovery of Color Blindness

John Dalton

Color blindness affects a person's ability to see shades red, green, blue, and yellow apart. Complete color blindness makes mostly or everything look gray. People with color blindness 

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