If you feel uncomfortable with the cold weather, or the so-called seasonal affective disorder (SAD), there may be a strange reason behind that, which is the color of your eyes. The treatment is very simple and free by walking as it will appear. Later.

The strange cause of wintertime depression is the color of the eyes, according to a recent British study by the University of Southern Wales, published by The Conversation and Newsweek magazine. The study says scientists are divided about why people feel weak and irritable in the winter months, A kind of clinical depression, while others think it does not exist at all, but the findings of the study is that the color of your eyes may actually be one of the factors that determine whether you will develop the condition of winter depression or not.

The study used a sample of 175 university students in Britain and Cyprus, and found that people with mild or blue eyes had a significant decline in the seasonal pattern assessment questionnaire of those with dark or brown eyes. These findings were consistent with previous research, The darker skin or darker eye was much more depressed than those with blue, gray or green eyes.

The reason why eye color may make some people more susceptible to depression, or seasonal mood changes, is because of the amount of light that an individual's eye can process.

In 1995, scientists discovered that some retinal cells instead of forming an image send information about the levels of brightness from the back of the eye to the hypothalamus in the brain. The region is responsible for the secretion of hormones such as oxytocin, which regulate temperature, hunger and sleep cycles.

The study indicates that eye color is not the only factor in winter depression, but there are other factors, such as long indoor time and life pressure. The study recommends treating this condition by walking outdoors, especially in sunny times in the morning. To improve their mood, pointing out that phototherapy sometimes helps in the treatment of seasonal affective disorder, after consultation with the general practitioner.