What are the 3 types of heterochromia?
What are the 3 types of heterochromia?
The three categories are complete, segmental, and central heterochromia. Complete heterochromia, also called heterochromia iridum, occurs when the two irises are different colors. Segmental heterochromia, also called heterochromia iridis, occurs when a patch of a different color appears in one iris.
What is the rarest heterochromia?
How rare is central heterochromia? Complete heterochromia is definitely rare — fewer than 200,000 Americans have the condition, according to the National Institutes of Health. That’s only about six out of every 10,000 people. With central heterochromia, each ring of color is distinct within the iris.
What is the rarest heterochromia eye color?
The Rarest Eye Colors and How They Occur
| Eye Color | Cause(s) |
|---|---|
| Heterochromia | Increased or decreased pigmentation in one iris or part of an iris. |
| Anisocoria | One pupil is larger than the other making one eye look darker. |
| Red or Pink | Little to no melanin due to albinism. |
Why do I have 3 different Colours in my eyes?
Heterochromia is determined by the production, delivery, and concentration of melanin (a pigment). It may be inherited, or caused by genetic mosaicism, chimerism, disease, or injury. It occurs in humans and certain breeds of domesticated animals.
Is it possible to have two types of heterochromia?
Central and Sectoral heterochromia can either affect one or both eyes. It is also possible for one person to express more than one type of heterochromia. I once met a girl who has both central and complete heterochromia. Her right eye is green and her left eye is blue.
How rare is heterochromia in humans?
Only about 11 out of every 1,000 Americans have heterochromia, a condition that results in two differently colored eyes. This trait is commonly found in animals and is relatively rare in humans and, in many human cases, the condition is hardly noticeable.
How common is sectoral heterochromia?
The condition is also known as heterochromia iridis or heterochromia iridum. Less than 200,000 people in the United States have heterochromia. Some types of heterochromia are common in dogs, cats, and horses. There are three main types of heterochromia of the eye. An ophthalmologist can diagnose heterochromia and investigate why it has occurred.
Can you develop heterochromia?
People who weren’t born with heterochromia might still develop it, as it can also be caused by trauma (due to injury or surgery) or disease (such as diabetes, eye tumors, or glaucoma). Acquired heterochromia might look as interesting as congenital heterochromia, but it often indicates the eye is damaged or unhealthy.