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Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, and skin wound infections.
Bright light therapy, commonly referred to as phototherapy, has been documented in multiple studies [4] [5] to be an effective treatment of SAD. [6] A study completed in 2009 revealed that as little as twenty minutes of light exposure can improve the mood of those with SAD. [7]
This suggests that light therapy may be an effective treatment for SAD. [34] Light therapy uses a lightbox, which emits far more lumens than a customary incandescent lamp. Bright white "full spectrum" light at 10,000 lux, blue light at a wavelength of 480 nm at 2,500 lux or green (actually cyan or blue-green [35]) light at a wavelength of 500 ...
Bright light therapy, widely understood to be an effective treatment for Seasonal Affective Disorder (SAD), can also be helpful in treating other types of depression, finds a new meta-analysis ...
This treatment involves regularly exposing the skin to ultraviolet (UV) light under medical supervision. Phototherapy can be performed in a healthcare provider’s office, a clinic, or even at ...
The history of light therapy can be traced back to ancient Egypt and India, where therapy with natural sunlight was first used to treat leucoderma. [3] In the 1850s, Florence Nightingale's advocacy of exposure to clean air and sunlight for health restoration also contributed to the initial development of light therapy for treatments. [4]
[27] [28] Rosenthal and his colleagues treated the patient with bright lights, which helped to successfully manage the depression. [3] [24] They conducted a formal follow-up study to confirm the success. The results were published in 1984, officially describing SAD and pioneering light therapy as an effective treatment method. [29]
One treatment strategy is light therapy (phototherapy), with either a bright white lamp providing 10,000 lux at a specified distance from the eyes or a wearable LED device providing 350–550 lux at a shorter distance. Sunlight can also be used.
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