Surprise .. The color of the eye determines your injury to the winter depression

If you feel uncomfortable when it is cold and the nights are long, you are not alone because there is a phenomenon called seasonal emotional disorder.SAD), Why people feel numb and irritable in winter, according to the US medical website "MedicalXpress".

Although SAD Is a recognized form of clinical depression, but a team of researchers has discovered that eye color can actually be one of the factors that determine the incidence of depression.

Researchers have found evidence that the color of the person's eye can have a direct impact on his sensitivity to grief.

To confirm the findings, the researchers used a sample of 175 students from two universities (one located in South Wales and one in Cyprus) and found that people with fair eyes or blue had a marked reduction in depression compared to those with brown or brown eyes.

These results are consistent with previous research that people with darker skin or dark eyes were much more depressed than those with blue eyes.

The reason that eye color can make some people more susceptible to depression or mood changes may be due to the amount of light that an individual's eye can handle.

The researchers explained that the retina is part of the cells that contain the eyeball, it is sensitive to light. When light enters the eye, these cells stimulate the nerve impulses that form a visual image in our brain.

In 1995, scientists discovered that some cells in the retina, instead of forming the image, simply transmitted information about light levels from the back of the eye to the hypothalamus of the brain, an important part brain secreting hormones (eg, oxytocin) regulating temperature. Hunger and sleep cycles.

The researchers therefore found that the light eyes (blue or gray eyes) were more sensitive to light, which meant that they did not need to absorb too much light, such as brown eyes or dark, before this information reaches the retinal cells.

Eye color, of course, is not the only factor in winter depression, because people who spend a lot of time indoors are more likely to suffer from depression, but just going out for normal walks, especially in sunny weather, will help to improve. Their mood.