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  1. Nov 2, 2021 · This random genetic “surprise” affects the melanin levels in different parts of the iris(es). Of the common eye colors, brown eyes have the most melanin and blue eyes have the least. Animals can have heterochromia, too. At some point, you’ve probably noticed a Siberian husky, Australian shepherd or border collie with two different-colored ...

  2. Jan 25, 2011 · This uncanny trait is caused by several factors, and can actually develop over time. Iris color develops during the first few months after birth, with the levels of the pigment melanin determining ...

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  4. Oct 27, 2023 · A person with differently colored eyes or eyes that are more than one color has heterochromia. Learn more about the symptoms, types, risk factors, causes, diagnosis, and treatment.

  5. Apr 15, 2024 · Almost all humans have two eyes that are the same color. Encountering someone with two different colored eyes is rare. In fact, only about 6 in every 10,000 people in the United States have different colored irises, a phenomenon known as heterochromia. We will discuss why these differences occur and if treatment is needed for this rare condition.

  6. Sep 12, 2017 · Waardenburg syndrome. Heterochromia that develops later in life due to illness, injury, or medication, is known as acquired heterochromia. This is less common than the genetic form. Diabetes can ...

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    • Why do some people have differently colored eyes?1
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  7. Mar 26, 2024 · A Word From Verywell. Iris heterochromia is a condition in which a person has two different colored eyes. Although a large proportion of cases are the result of genetic mutation, heterochromia can also result from congenital disease or other ocular or systemic disorders. In these cases, further evaluation with an ophthalmologist is warranted.

  8. Heterochromia. Heterochromia is when your eyes are different colors. Each eye may be a different color, or there may be color variations within the same eye. It’s often due to a harmless genetic mutation. Other causes include congenital and acquired conditions, eye injury and some eye drops. An eye care specialist can diagnose or rule out ...

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