[The use of lasers in medicine with special reference to dermatology]

The laser machine and the unique quality of the laser beam are described. The basis of the medical application of laser is its capacity to concentrate large amounts of energy on a small volume of tissue, mostly resulting in thermal coagulation necrosis. The effect of monochromate laser radiation varies, depending on the different absorption of various laser beams by tissues. Indications of various types of lasers for treatment, especially in dermatology, are discussed and safety instructions are mentioned.