Why are the eyes of different colors?

Anton Kravchenko
Anton Kravchenko
February 14, 2013
Why are the eyes of different colors?

Today we will talk about one rather rare, but extremely interesting phenomenon - heterochromia. Heterochromia is a phenomenon when a human or animal eye has a different color. Generally speaking, such a feature arises due to the lack of color pigment - melanin. But let's thoroughly understand why the eyes are of a different color in some, while others have the same color.

Heterochromia - a hereditary mutation

In general, any deviation from the norm in appearance is formed due to injuries in the womb or mutations at the gene level. Heterochromia refers to the second species. It occurs a little after fertilization of the cell. It is believed that heterochromia can not be transmitted. By the way, not only mutation can cause this phenomenon. Diseases such as Hirschsprung disease, Waardenburg Syndrome can also trigger this unique phenomenon. In addition, studies have shown that heterochromia is more common in women than men.

A bit of history

At different stages of history, people with heterochromia were treated differently. It has long been believed that people with different eye colors were associated with witchcraft and evil spirits. They were called the children of the devil, witches, etc. All these attacks stopped only after the Middle Ages. And now people with heterochromia do not cause fear at all, because science has proven why they have different color eyes.

It should be said that not only in humans, but also in animals there are eyes of different colors. For example, in Husky dogs, heterochromia is quite common. Cats with different eye colors are also found. Especially often this phenomenon is observed in cats with white color of wool, and in Angora cats.

Heterochromia today

Interestingly, due to the great popularity of colored lenses, people often experiment with their eye color. Therefore, if you meet a person who has eyes of a different color, it is not necessary that he has heterochromia. But people with congenital or acquired heterochromia are not always happy with their features. But colored lenses are able to even out the color of the iris. In general, heterochromia is a rather rare phenomenon.It is found in only 4 people out of a million.

Among famous personalities, there are also people with heterochromia. For example, Mila Kunis, David Bowie, Tim McIlroth have heterochromia. By the way, if you want to see eyes of different colors right now, photos of people with heterochromia are easy to find on the Internet. However, do not trust all the photos that you find there, because the eyes can be changed using lenses or Photoshop. So, I hope, now you know what the different eye color is called, because of what it appears and from whom you can meet it.