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color vision
the ability to see colors, which is a function of the retinal cones. There are considered to be three types of cones, each containing chemicals that respond to one of the three primary colors (red, green, and violet). White light stimulates
all three sets of cones; any other color stimulates only one or two sets. The brain can then interpret the impulses from these
cones as various colors. See also color vision deficiency.

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