Heterochromia/people with 2 eye colors

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Heterochromia means, Usually the term is used to describe the condition where a person has different colored eyes one blue eye and one green eye, for example.

Other terms to describe different colored eyes are heterochromia iridis and heterochromia iridum. "Iridis" and "iridum" refer to the iris of the eye. The iris is the thin, circular structure that surrounds the pupil and contains the pigment melanin, which gives our eyes their distinctive color.

The amount of melanin in the iris determines whether we have blue eyes, green eyes, hazel eyes or brown eyes. Blue eyes have the least amount of melanin in the iris brown eyes have the most.

Only about 11 out of every 1,000 Americans have this trait.

Different types of Heterochromia.

There are actually three distinct categories of heterochromia, although some people may have a combination of two or three:

Complete (each eye is a different color).

Sectoral (a segment of one or both irises is a different color).

Central (a different color surrounds the pupil).

How Does Heterochromia Happen?

There are lots of different reasons! In the vast majority of cases, people are born with  different-colored eyes, but there are times when heterochromia is caused by something else. Do you or someone you know have different-colored eyes? If so, this unique characteristic most likely happened from one of the reasons listed below.

Family DNA: Usually, if the trait is apparent from babyhood, then it came from the family gene pool. In fact, since it's a dominant autosomal trait, chances are good one of the person's parents has it too.

Trauma during Birth: If facial trauma occurs around the time birth, it may prevent melanin from 'coloring' the eye in the affected area of the face.

Genetic Mutation: Sometimes, a mutation in one of the genes regulating eye color may occur during embryonic development.

Disease: There are certain diseases such as Horner Syndrome that may cause heterochromia during a person's lifetime.

Injury: Heterochromia that happens later in life is usually caused by eye injuries or specific types of medication.

Chimera: Under extremely rare circumstances, a person could be a chimera (when they contain separate DNA from an undeveloped twin) and have eyes with different colors as a result.

Most people with heterochromia inherited it from a parent, this is called congenital heterochromia. The gene for heterochromia is autosomal dominant. This means that if a parent has it, there is a good chance it will be passed down through generations.

Some congenital heterochromia is due to syndromes such as Waardenburg syndrome. These are genetic disorders that disrupt the even distribution of pigment which then affects eye color.

Scientists are only beginning to scratch the surface of how eye color is inherited. There are times when Mother Nature mixes things up in weird and wonderful ways. 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.

How Rare Is Heterochromia in Humans?

Not much research has been done to come up with a good estimate of the prevalence and incidence of heterochromia.

It was also found that females were two times more likely to have heterochromia than males.

Their isn't much information on the characteristics on people with Heterochromia, their is still a lot of mystery on people with Heterochromia.

Hello my lovely readers,
I'm deeply sorry that their wasn't much about the characteristics of people with 2 eye colors since their is still much to discover about them.

But I hope you enjoyed knowing how people get it for one I think people with this eye are color are so beautiful and unique.

They are different and stunning to me I enjoyed researching this and hope you all loved this chapter I will be slowly trying to make more chapters.

Due to school so I'm sorry i don't update much well goodbye and have a great night/day.


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