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The rarest eye color is green. Out of the conventional eye colors we'd think of—brown, blue, hazel and green—green is the rarest of the four. Only about two percent of the world's population ...
Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [ 1][ 2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [ 3]: 9. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in ...
Heterochromia iridum. Heterochromia is a variation in coloration most often used to describe color differences of the iris, but can also be applied to color variation of hair [ 1] or skin. Heterochromia is determined by the production, delivery, and concentration of melanin (a pigment ). It may be inherited, or caused by genetic mosaicism ...
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How Rare Are Hazel Eyes? According to the World Atlas, only about five percent of the world's population have hazel eyes—just behind the rarest eye color, which is green. The rarity of hazel ...
Frequency. Red–green: 8% males, 0.5% females (Northern European descent) [ 2] Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [ 2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem ...
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Limbal ring. A limbal ring is a dark ring around the iris of the eye, where the sclera meets the cornea. [ 1] It is a dark-colored manifestation of the corneal limbus resulting from optical properties of the region. [ 2] The appearance and visibility of the limbal ring can be negatively affected by a variety of medical conditions concerning the ...