In Science Daily Online we talk to you once about the reason why we get red eyes in flash photographs, this time we want to continue to look at the tone of our eyes .What are the least common colors? We present the 5 most «rare» colors in the human species .
Eye colors: The 5 most surprising
1.Red or pink
The first in the list of the least found colors among humans.This eye color is typical of those with albinism .Depending on the degree of their lack of pigmentation they will tend to be more pink or red .

Like when we talk about going out with red eyes in flash photographs, in these cases something similar happens, when it gives them light, what we see in red is the reflected tone of the v blood asos in the back of the eye .If we can see them it is because there is practically no pigment covering these vessels.
2.Violet
This tone is also produced by a lack of pigmentation and we can also find it in individuals albinos , but also in some people (few) who do not they are.

The lack of pigmentation that reflects the red of the back of the retina (of its blood vessels) mixed with the reduced pigment that may be in the iris causes it to this color.Do you know how many people have this tone in their birth eyes? Less than 1% of the population .

This coloring of the iris was made famous by Liz Taylor, who had a really special pigmentation in her eyes.
3.Ambar
Golden eyes, like a wolf, a color that surprises those who encounter an individual with this pigmentation.

This color is produced due to a higher concentration of a pigment called« lipochrome ».It is a particularly rare type of eyes that occurs more often in Europe, some areas of Asia and Brazil.It is a rare coloration, which still surprises researchers.
4.Green
This color is only found in a 2% of the world's population. It is one of the rarest colors, no obstacle It is quite easy for you to find among the inhabitants of North and Central Europe .
The coloration of these eyes has very little melanin and quite a "lipochrome" (same as those of amber color).This lack of melanin gives the iris a bluish hue that mixed with lipochrome...Bum! It makes the color green appear!

It should be noted that although it is a rare color we usually see it very often on the big screen, since there are many actors and actresses with this feature, between them: Charlize Theron, Scarlett Johanson, Channing Tatum...
5.Black
The reason for this coloring is a large amount of melanin located in the iris , so much that it makes brown eyes extremely dark, to the point of looking black.The more melanin there is in your iris, the darker your eyes will be.This color is present in the 1% of the population and is more among individuals who come from Africa, Asia or who descend from Native Americans.

Obviame There are a number of diseases, including aniridia, Wilson's disease, cataracts...that vary the appearance of the iris.
And you, do you have the eyes of any of these curious colors?
If you liked this article, you may Interested to know why there are more blondes in the Nordic countries.
Images: Kaytee Riek, Amanda G, spirituska, Bruna Miranda, Daniel Horacio Agostini, Shashank Kapur
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