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Surgery.com / Plastic & Cosmetic / Laser Surgery

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Last updated: 11/24/2009

Definition

The term laser means light amplification by stimulated emission of radiation, and it uses a laser light source (laser beam) to remove tissues that are diseased or to treat blood vessels that are bleeding. Laser beams are strong beams of light produced...

by electrically stimulating a particular material. A solid, a liquid, or a gas is used. Alternatively, the laser is used cosmetically; it can remove wrinkles, birthmarks, or tattoos.

The special light beam is focused to treat tissues by heating the cells until they burst. There are a number of different laser types. Each has a different use and color. The color, or the light beam, relates to the type of surgery that is being performed and the color of the tissue that is being treated. There are three types of laser: the carbon dioxide (CO2) laser; the YAG laser (yttrium aluminum garnet); and the pulsed dye laser.


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This narrated animation describes the function of the major structures of the eye, namely the pupil, iris, lens, cornea, and retina.

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Cosmetic laser surgery in progress. The wavelengths of the laser's light can be matched to a specific target, enabling the physician to destroy the capillaries near the skin's surface without damaging the surrounding tissue. (Photograph by Will & Deni McIntyre, Photo Researchers, Inc. Reproduced by permission.) Cosmetic laser surgery in progress. The wavelengths of the laser's light can be matched to a specific target, enabling the physician to destroy the capillaries near the skin's surface without damaging the surrounding tissue. (Photograph by Will & Deni McIntyre, Photo Researchers, Inc. Reproduced by permission.)




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Other Information

Laser surgery is surgery using a laser to cut tissue instead of a scalpel. Examples include the use of a laser scalpel in otherwise conventional surgery, and soft tissue laser surgery, in which the laser beam vaporizes soft tissue with high water content. Laser resurfacing is a technique in which molecular bonds of a material are dissolved by a laser.

Laser surgery is commonly used on the eye. Techniques used include LASIK, which is used to correct near- and far-sightedness in vision, and photorefractive keratectomy, a procedure which permanently reshapes the cornea using an excimer laser to remove a small amount of tissue.


From http://en.wikipedia.org/wiki/Laser_surgery

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