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In sectoral heterochromia, areas of the same iris contain two different colors, the contrasting colors being demarcated in a radial, or sectoral, manner. Sectoral heterochromia may affect one or both eyes. [31] It is unknown how rare sectoral heterochromia is in humans, but it is considered to be less common than complete heterochromia.
Two different eye colors are known as heterochromia iridum. As a result of heterochromia iridum, it is also possible to have two different eye colors. This occurs in humans and certain breeds of domesticated animals and affects less than 1 percent of the world's population. [70]
Heterochromia (also known as a heterochromia iridis or heterochromia iridum) is an ocular condition in which one iris is a different color from the other iris (complete heterochromia), or where the part of one iris is a different color from the remainder (partial heterochromia or sectoral heterochromia). Uncommon in humans, it is often an ...
Heterochromia iridum is the name of this rare phenomenon. It occurs when the iris—the colored part of the eye surrounding the pupil—exhibits two different colors.
With most eye colors, the amount of melanin is consistent across the entire iris—the more melanin, the darker the eye will appear. With hazel eyes, however, varying amounts of melanin exist in ...
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Type 1 is characterised by congenital sensorineural hearing loss, pigmentary deficiencies of the hair such as a white lock of hair in the front-centre of the head or premature greying, pigmentary deficiencies of the eyes such as different-coloured eyes (complete heterochromia iridum), multiple colours in an eye (sectoral heterochromia iridum) or brilliant blue eyes, patches of skin ...
Humans are blessed to share the planet with just over 2.1 million recognized species of animals. And scientists say there are millions more that are yet to be discovered.