MedlinePlus Medical Encyclopedia: Wood's lamp test

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Wood's lamp test - of the scalp

A Wood's lamp is a light that uses long wave ultraviolet light. When an area of scalp that is infected with tinea (a type of ringworm fungus) is viewed under a Wood's light, the fungus may glow. This test may be done to detect the presence of a fungal scalp or skin infection.

Update Date: 1/17/2004

Updated by: Michael Lehrer, M.D., Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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