Eye colors have been the subject of scientists’ research for many years. Today we covered the facts about eye colors that allow us to find out if people are related or not and even about eye conditions that can arise from eye color.
human eyesIt is one of the most interesting and complex parts of our body. Our eyes not only help us see everything around us, but they are one of the unique features that best define us. With this eye colorsis set after a series of puzzling biological events take place and holds a lot of interesting information, including:
Eye colors, which are the subject of research by many scientists, are one of the first features that catch our eye in the person in front of us. It can be a harbinger of even eye problems that may occur in the future. eye colorshas interesting facts that we think you may not have heard of, some, if not all. Let’s move on to our list of facts about eye colors.
Interesting facts about eye colors:
- All blue-eyed people descend from the same ancestor
- You can have two different eye colors
- All humans have brown eyes.
- Each eye has a unique structure
- Blue eyes are more sensitive to light
- Eye color changes with age
- It is very difficult to predict the eye color of the baby to be born.
All blue-eyed people have a common ancestor
if to blue eye color If you do, you have a mutation that causes a lack of pigment in the iris. Researchers at the University of Copenhagen believe that the mutation that causes blue eyes first appeared in a human living in Europe between 6,000 and 10,000 years ago. I mean, all the blue-eyed people alive today to a common ancestor has.
You can have two different eye colors
heterochromia, a person have two different eye colors that is. This is a mutation that can often occur in cats and dogs. There are three different types of heterochromia. Full heterochromiais when one eye is completely different from the other eye color. partial heterochromiais when only one part of one eye has a different color from the rest of the same eye. This can occur in both eyes. central heterochromia On the other hand, the color forming the pupil border has a different color compared to the rest of the eye.
All people’s eyes are actually brown
our eyes It can have various colors such as blue, green and hazel, but these pigments are never found in the human eye. Everything is in the iris (ring around the pupil) to the amount of melanin it depends. Melanin, which is naturally dark brown, is also the same pigment that determines our skin and hair color. So how much more in the iris area melanin the darker the eye color. Also, eye color depends on how light is scattered as it passes through the eye. The melanin we mentioned above absorbs light and prevents it from reflecting from the eye surface. a dark color causes it to occur.
Hans Eiberg, from the Department of Cellular and Molecular Medicine at the University of Copenhagen, said that before the genetic mutation that caused the blue eye color 6,000 to 10,000 years ago, everyone has brown eyes announced that he has This genetic mutation, which affects the OCA2 gene in our chromosomes, prevents the production of brown eye color, a new eye color made it appear. In cases where the OCA2 gene is completely affected, albinism ailment arises.
Each eye has a unique structure
Just like a fingerprint, iris or in the colored part of the eye The colors and patterns found are unique. In fact, this uniqueness is so great that iris scans are more successful than fingerprint recognition technology. Identical twins they don’t even have the same irises.
Blue eyes are more sensitive to light
melanin, By blocking UV lightprotects the eyes from the sun. to blue eye color Because people with diabetes have less melanin, they tend to be more sensitive to light and more susceptible to damage from UV rays.
Eye color may change with age
In particular, about 15% of the white population in eye color experiences a gradual change. This difference in color tone can cause problems such as Horner’s syndrome and pigmentary glaucoma. some diseases may be a precursor. Horner’s syndrome is a condition in which the nerves responsible for pupil and eyelid movements are damaged. Pigmentary glaucoma usually causes the iris to have a darker color.
It is very difficult to predict the eye color of the baby to be born.
Although it has to do with dominant and recessive genes, a baby’s eye color can only be determined by its mother and father. to eye colors you can’t predict. According to the latest scientific research, in determining eye color 16 different genes appeared to play a role. Therefore, there are many different eye colors in the world. However, babies without melanin Because they are born, their eye color is blue.
What eye color has the most in the world?
In the world most common eye color it is brown. It is estimated that around 55% to 70% of the world’s population has brown eye color. Although eye color is partly genetic, brown eye color dominant gene is thought to be. There are also light, normal and dark brown tones of this eye color and they are quite common.
What is the rarest eye color in the world?
Although studies on the subject continue, least found One of his eye colors is green. Green eyes are less than brown eyes and less than blue eyes. more melanin level has. The green eye color, which is formed by the combination of a light brown pigment known as lipochrome and a yellowish pigmentation, can appear in different tones depending on the weather and light.
So what are the rarest eye colors?
- Green – 2%
- Gray – 3%
- Hazel – 10%
- Blue – 8-10%
- Brown – 55-79%
Rare eye colors are caused by various mutations. Research has shown that everyone who lived on Earth thousands of years ago to brown eyes reveals that he has As we mentioned above, the first person with blue eye color has a drug that reduces melanin production. genetic mutation believed to have.
Between 55% and 79% of people have brown eyes, and dark brown eye color is most common in Africa, East Asia and South East Asia. Light brown eyes are most common in Western Asia, America, and Europe. green eye color is found in only 2% of people worldwide.
We mentioned the blue eye color above, but the interesting facts about it are not just these: