Abstract
Phototherapy is one treatment of circadian sleep-wake disorders, which is based on consensual and numerous scientific and clinical evidences. Phototherapy efficiency depends on several light characteristics based on intensity, length of exposure, time of exposure and wavelength. Phototherapy is potentially indicated in the following circadian disorders: advanced sleep-wake phase disorder (ASWPD), delayed sleep-wake phase disorder (DSWPD), non-24-hour sleep-wake rhythm disorder (N24SWD), jet-lag and night-shift work sleep-wake disorders (NSSWD). Phototherapy, acting via the retina, may be avoided in patients with retina disorders, an ophthalmologist should be consulted.
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