Medical lasers use precisely focused light sources to treat or remove tissue. Lasers use a specific wavelength of light, focused in a narrow beam, which creates very high-intensity light. When focused on a tiny area, they can cut through tissue, and can therefore be used in place of a scalpel in surgical procedures.
In the medical field, lasers are most often used for cosmetic procedures, including hair removal, rosacea and acne treatment, and removal of scars and stretch marks, and eye surgery, such as cataract treatment and refractive surgery for correcting vision. In dental practices, lasers are often used to disinfect root canals and remove decay, as well as to whiten teeth.