BSIP, LAURENT / SCIENCE PHOTO LIBRARY BSIP, LAURENT / SCIENCE PHOTO LIBRARY
PUVA therapy. Man undergoing psoralen-ultraviolet A (PUVA) therapy on his hands and feet. PUVA therapy is used to treat skin disorders such as psoriasis or eczema. The patient is given a drug, psoralen (8- Methoxysporalen), two hours before exposure to ultraviolet (UV) light in special cabinets. The drug reacts with UV light in the skin, resulting in an improvement of the skin condition. Between 85 and 90 percent of people with psoriasis are completely clear of the condition after 30 treatments (10 weeks). Special glasses must be worn during the treatment to prevent UV damage to the eyes.
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