Ultraviolet light therapy or ultraviolet Phototherapy is a form of treatment for certain skin disorders (including atopic skin disorder and vitiligo when used with psoralen to form the PUVA treatment) It consists mostly of the UVA band of ultraviolet light (fairly closely matching the ultraviolet output from the sun) and is usually delivered from a fluorescent bulb specially designed to output this frequency of ultraviolet.
This treatment is similar to the light from good quality solariums but differs from the mainly UVB ultraviolet band used to treat psoriasis.
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