LIGHT THERAPY- AN EFFECTIVE REMEDY FOR SEASONAL AFFECTIVE DISORDER (SAD)

Light, like every other thing in this world, is meant for a purpose; not only is it the indirect source of providing essential nutrients to our body but has also been researched to be a major factor affecting our mental well-being. Human moods are said to be very well influenced by the impact of sunlight. The glee on every other person's face on a bright sunny day after prolonged cold days is no surprise. It comes in naturally and has been the subject of study by many medical practitioners since ages.

Light deprivation is usually experienced by people living in areas where the nights are longer and colder than the days. Statistics show that as much as 10% of the population in the north show symptoms of lethargy or lassitude due to the lack of exposure to sunlight. Moreover it has also been found out that women as compared to men are more likely to get affected by almost a 3:1 ratio1. When at a milder stage, light deprivation can be termed as ''Winter Blues''; a condition that results in restrained energy levels, depression and slower reflex actions. Not that the list ends over here, but the incremented cravings for sweet and carbohydrate rich foods makes the patient put on weight, hence adding up to the complexities. A more pronounced form of the just mentioned condition is what we term as Seasonal Affective Disorder aka SAD. With double the level of depression, it is usually accompanied by lack of concentration and even memory loss!

But as the adage goes, ''Necessity is the mother of invention''; there arose the need of producing artificial light, as much effective as the full spectrum sunlight, to serve people being deprived of the natural blessing and useful light boxes came into being! What a light box or more specifically a light therapy box does is that it mimics outdoor sunlight in a way that it contains high output fluorescent bulbs, shielded by a filter that acts as a UV light protector. The light box is then positioned carefully so that it is tilted and placed a little above your eyes, minimizing any unpleasant glare. The patient is then exposed to this artificial light for a time duration that depends on the demand and lifestyle of the affected person. Usually for a beginner, a 15-20 minutes' exposure is said to be enough, however the span may be extended when needed.

Light from a light box when hits the retina in the eye, gives the brain a stimulus to release certain ''active hormones'' that bring about a biochemical change in the body lifting your mood and reducing the symptoms of SAD. Not only does light therapy aid in resolving core SAD issues, it improvises one's wake-sleep cycle as well. This add-on benefit has its' roots lying in the research made by scientists that SAD is related to an imbalance in the body's natural circadian rhythms or the body's inner clock. The latter term is responsible for governing the timing of our sleep. Hence when we repeatedly try to sleep out of sync with our circadian rhythm, depression occurs; a continued condition like this might even lead to SAD. Light therapy, however, alleviates every affected person of such prevailing conditions.

To sum up, Light therapy is a simple, effective and medically recognized way to beat these symptoms and live a normal, healthy life.

Reference

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