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Laser surgery involves the use of a laser (which stands for light amplification by stimulated emission of radiation) for a range of medical and cosmetic procedures. A laser is a source of light which can be used for a variety of applications in surgery. 

Light from lasers differs from that which you encounter in everyday life. Naturally occurring light from the sun, or artificial light from a lightbulb, emits a range of wavelengths of light, travelling in many different directions. However laser light is polarized, focusing a beam in one precise location, according to Oregon State University.

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