Do people with SAD really benefit by light-box therapy? It seems ridiculous to me but I am also exhausted from being depressed! I wouldn’t know where to start looking!
When sunlight enters the eye, it triggers the Circadian rhythm clock, that not only wakes up the brain but tends to result in a pleasant mood. Studies have shown that some brains are very susceptible to the lack of sufficient sunlight, due to living in the arctic circle or in other parts of the globe where the days are very short. This can result in the development of SAD, or seasonal affective disorder, which tends to result in depression during very short days in the winter months and tends to lighten up as the days become longer and more sunlight is available. Light therapy has been used for decades to treat this type of light-deprivation depression.