Eye color is a polygenic phenotypic character determined by two distinct factors: the pigmentation of the eye 's iris   and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the iris pigment epithelium located on the back of the iris , the melanin content within the iris stroma located at the front of the iris , and the cellular density of the stroma. The brightly colored eyes of many bird species result from the presence of other pigments, such as pteridines , purines , and carotenoids.
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This is fiction, but several real medical conditions can cause changes in eye color. The myth has been traced back to , though it may have been spread earlier. People with the fake condition are said to be able to live to , and they allegedly have:. It controls the amount of light that enters the eye. Most babies are born with brown eyes. However, many of Caucasian heritage initially have blue or gray eyes. This color may darken over time, to become green, hazel, or brown. Infants with brown eyes rarely experience changes in iris color, although the shade of brown may become more prominent. A change in iris color occurs because of a protein called melanin, which is also present in the hair and skin. Cells called melanocytes produce melanin in response to light exposure.
Alexandria's Genesis is a genetic disorder which is also known as Purple Eyes. The disorder makes people have pale skin and purple eyes. Some cultures consider women with purple eyes as highly attractive. The condition is a result of mutation of genes, that makes eyes change their colour from blue to pink within the first 6 months after birth.
Elizabeth Taylor will be remembered for many things her passionate performances in films, fondness for expensive jewelry, multiple marriages and, of course, those famous violet eyes. Thanks to colored contact lenses, anyone can have violet-colored eyes these days. Taylor didn't come by her purple peepers that way; the first tinted contact lenses weren't commercially available until