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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.
Aniridia is the absence of the iris, a muscular structure that opens and closes the pupil to allow light into the eye. It is also responsible for eye color. Without it, the central eye appears all black. It can be congenital, in which both eyes are usually involved, or caused by a penetrant injury. [1]
Black Iris, formerly called Black Iris III, [1] [2] is a 1926 oil painting by Georgia O'Keeffe. [3] Art historian Linda Nochlin interpreted Black Iris as a ...
According to traditional Chinese and Japanese face reading, the eye is composed of two parts, the yin (black, iris and pupil) and the yang (white, sclera).The visibility of the sclera beneath the iris is said to represent physical imbalance in the body, and is claimed to be present in alcoholics, drug addicts, and people who over-consume sugar or grain.
This is a list of notable people who have been documented as having heterochromia iridis, a condition when the irises have different colours. People who are frequently mistakenly thought to have heterochromia are not included, but may be listed in the Notes section.
Wearing a ballcap atop a head wrap, paired with a baseball jersey that read "Brush Creek Inn" on the front and "Iris 12" on the back, Iris launched with the Cruisers' traditional opener, "Agnes."
Central heterochromia is also an eye condition where there are two colors in the same iris; but the arrangement is concentric, rather than sectoral. The central (pupillary) zone of the iris is a different color than the mid-peripheral (ciliary) zone. Central heterochromia is more noticeable in irises containing low amounts of melanin. [32]
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