Ultraviolet Therapy
Ultraviolet Rays
That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.
Spectrophotometry, Ultraviolet
Radiation Effects
PUVA Therapy
Erythema
Sunscreening Agents
Chemical or physical agents that protect the skin from sunburn and erythema by absorbing or blocking ultraviolet radiation.