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Eye color, specifically the color of the irises, is determined primarily by the concentration and distribution of melanin. Although the processes determining eye color are not fully understood, it is known that inherited eye color is determined by multiple genes. Environmental or acquired factors can alter these inherited traits. [7]
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.
Waardenburg syndrome is a group of rare genetic conditions characterised by at least some degree of congenital hearing loss and pigmentation deficiencies, which can include bright blue eyes (or one blue eye and one brown eye), a white forelock or patches of light skin.
There are two main types of melanin that contribute to eye color: eumelanin and pheomelanin. Eumelanin is a black and brown pigment, whereas pheomelanin is a red and yellow pigment.
Brown irises contain more or less melanin. Some eyes have a dark ring around the iris, called a limbal ring. Eye color in non-human animals is regulated differently. For example, instead of blue as in humans, autosomal recessive eye color in the skink species Corucia zebrata is black, and the autosomal dominant color is yellow-green. [101]
Find out the one thing eye doctors say you should never, ever, do—along with the mistake a lot of people make often that needs to change STAT. Related: 7 Foods to Eat to Help Keep Your Eyes Healthy
Those that 'see' or perceive the color in external space are called projectors, and those that perceive the color in the mind's eye are often called associators, but these terms can be misleading to understanding the nature of the experience. [2] [3] For most synesthetes, the condition is not wholly sensory/perceptual. [3]
Changes in the eye can help predict other health concerns in the body, such as diabetes and high blood pressure. ... doctors have known that the eyes can also offer a view into a person’s ...