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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
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.
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]
In the United States, the term "Black Irish" was initially used in the 19th and 20th centuries by Irish Americans to describe people of Irish descent who have black or dark-colored hair, blue or dark eyes, or otherwise dark coloring.
Woman with Waardenburg syndrome type 2, showing heterochromia and white forelock. The difference that defines type 2 from type 1 is that patients do not have the wider gap between the inner corners of the eyes (telecanthus/dystopia canthorum). Sensorineural hearing loss tends to be more common and more severe in this type.
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."
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] Isolated aniridia is a congenital disorder that is not limited to a defect in iris development, but is a panocular condition with macular and optic nerve hypoplasia, cataract, and corneal changes. [2]
A Somali woman with indha kuul ("kohl eyes") Usage of kohl eye paint in the Horn of Africa dates to the ancient Kingdom of Punt. [4] Somali, Djiboutian, Ethiopian, and Eritrean women have long applied kohl (kuul) for cosmetic purposes, as well as to cleanse the eyes, lengthen eyelashes, and to protect the eyes from the sun's rays. [14] [15]