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Light therapy - Ethnoscience Glossary Terms and Abbreviations
In light therapy, natural and artificial light is used to restore normal circadian rhythms. Circadian rhythms are the body's internal clock that controls sleep cycles, hormone production and other body functions. The types of light that may be used include full spectrum light, bright light, ultraviolet light and laser light. The patient spends specified periods of time in an area lit with these lights. Light therapy is used in the treatment of seasonal affective disorder (SAD), some forms of mild depression, sleeping disorders, skin problems and other problems related to disturbed circadian rhythms.