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I have heard stories of people with 4 types of cones instead of 3 in their eyes that allow them to see more colors or different colors than other people. I know that some animals like bees naturally have 4 cones, but is this a real thing for humans? I guess it's so rare that it sounds kind of crazy. I guess I'm also thrown off by click-baity article names like "This Woman Sees 100 Times More Colors Than The Average Person"


Does color blindness affect functionality of the cones or density of the cones?


From the article, it appears there can be a variation of deficiencies in the cones to cause color blindness, including functionality of certain cones or the number of cones.