LASIK eye surgery, (LASIK - short for Laser Assisted In Situ Keratomileusis) is a surgical procedure that uses a cool (non-thermal) beam of light to gently reshape the cornea — the surface of the eye — to improve vision.

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The LASIK eye surgery treatment itself usually takes less than a minute, while the entire procedure takes around 15 minutes per eye.

The laser vaporizes tissue to flatten the cornea (for nearsightedness), steepen the cornea (for farsightedness), and/or smooth out corneal irregularities (for astigmatism). In most cases, the thickness of the layer of corneal tissue removed by the laser is less than the thickness of a human hair. The goal of any laser vision correction procedure is to reshape the cornea so it does a better job of focusing images onto the retina.

Current FDA-approved laser vision correction methods, such as LASIK eye surgery, have a higher predictability of the final result with a lower incidence of complications. Additionally, older non-laser techniques typically involved manually performed incisions rather than the automated computer controlled systems that are used now to reshape the cornea.

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