Eyes are the reflection of the soul? Possible. However, a new study found that the color of the human eye can affect his health.
Relationship between eye color and health excited scientists for many years. Scientists from the University of Pittsburgh decided to seriously address this issue. Conducted their study showed that eye color may be responsible for the body's response to pain.
The researchers observed 58 pregnant women. Those who had the light color eyes, felt less pain during childbirth. In addition, blue-eyed mother rarely fell into depression and differed more positive thoughts, writes Daily Mail.
This led scientists to conclude that the blue-eyed people are easier to tolerate pain than dark-eyed. The results of the study were presented at the annual meeting of the American Society for the Study of Pain (American Pain Society).
Researchers say that the reason for this lies in the genes.
Until recently it was believed that a specific color for each eye meets the specific gene. In fact, it affects about 12-13 gene variations.
Today, there are technologies that can identify genetic markers of human eye color, up to 90 percent. But where is your health? The fact that the genes controlling the eye numbers are also responsible for other processes in the body. For example, the gene NCX-4, which indicates a dark eye color control proteins, associated with pain.
Genes associated with melanin (the pigment that makes dark eye) are also relevant to pain. For example, an inherited liver caused Dubin-Johnson syndrome, leads to the formation of the brown pigment of liver cells associated with the accumulation of melanin. Symptoms of this are pain and fatigue.
From the level of melanin also depends craving for alcohol. Previous studies have shown that blue-eyed people drink more hard liquor than dark-eyed. More melanin causes the brain to work faster and smarter. This explains the fact that brown-eyed people have the fastest response. But the blue-eyed take more informed and far-sighted decision.
According to scientists from the University of Copenhagen, initially we all have had dark eyes and blue-eyed people appeared 6-10 thousand years ago as a result of gene mutation. It is worth noting that this mutation is not attached iris blue shade, but simply turns off the mechanism that produces melanin. Lack of the same pigment makes the skin bright.
Sensitivity of blue-eyed people to sunlight leads to a gradual cell death in the back of the eye. As a result, a person loses their sight. The same goes for green eyes.
More on eye color depends on the risk of diabetes and the emergence of hearing problems. Studies confirm that in most cases these illnesses suffer blue-eyed people. Again blame melanin. Pigment protects nerves in the brain from noise exposure.
But do not worry about the color of his eyes. Despite the genetic link between eye color and health, none of these discoveries has no definitive proof. The picture is complicated more genes, the researchers note.
Recently, other scientists were able to explain where are natural blondes.