SummaryLasers now have a wide vatiety of nedical applications, ranging from the dissolution of coronary attery thrombus to the repair of a detatched rctina. The main types of laser in medicine are surgical, photocoagulato, photoradiation therapy, and cold Iasers which are used by acupuncturists. Cold lasers act directly an cells to imprcve healing anal realuce inflanmation. They are also used as an eflective substitute for needling or electrical stimulaLion.