Laser therapy is currently one of the most rapidly evolving areas of medical technology,The term laser is an acronym for light amplification by the stimulated emission of radiation. Since the development of first laser by Maiman and the introduction of theory of selective photothermolysis in 1980 by Anderson and Parish, it gained widespread acceptance in dermatology and is now used for the treatment of numerous cutaneous conditions including pigmented and vascular lesions, tattoos, scars, unwanted hair, and aging skin. When a laser is used on the skin, the light can be absorbed, reflected, transmitted or scattered. Once laser energy is absorbed, the possible effects are photochemical, photothermal and photoacoustic. Due to different clinical applications of wavelengths and pulse durations, the choice of laser should be based upon the individual absorption characteristics of the target chromophore.
