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The irises of human eyes exhibit a wide spectrum of colours. 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 ...
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 eyes can be attributed to ...
On the other hand, brown is the most common eye color. According to the American Academy of Ophthalmology (AAO), more than half of all people have brown eyes! The AAO says that it’s an inherited ...
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 ...
Together, they account for brown, green and blue, but not hazel or grey eyes. Science is still working on how we get those. All blue-eyed people can trace their ancestry back to a single human ...
Hazel eye. Hazel eyes are due to a combination of Rayleigh scattering and a moderate amount of melanin in the iris' anterior border layer. [41] Hazel eyes often appear to shift in color from a brown to a green. Although hazel mostly consists of brown and green, the dominant color in the eye can either be brown/gold or green.
Jane Elliott (née Jennison; [2][3] born November 30, 1933) is an American diversity educator. As a schoolteacher, she became known for her "Blue eyes/Brown eyes" exercise, which she first conducted with her third-grade class [a] on April 5, 1968, the day after the assassination of Martin Luther King Jr. The publication of compositions which ...
Specialty. Dermatology. Albinism is a congenital condition characterized in humans by the partial or complete absence of pigment in the skin, hair and eyes. Albinism is associated with a number of vision defects, such as photophobia, nystagmus, and amblyopia. Lack of skin pigmentation makes for more susceptibility to sunburn and skin cancers.