LASIK, also known as laser-assisted in situ keratomileusis, is an option for glasses or contact lenses. To enhance vision, a specialized cutting laser is used during LASIK surgery to alter the shape of the cornea accurately, the dome-shaped transparent tissue at the front of the eye. The cornea accurately bends (refracts) light onto the retina at the rear of the eye in eyes with proper vision. However, nearsightedness, farsightedness, or astigmatism cause the light to be bent improperly, causing hazy vision. Although vision correction using glasses or contact lenses is an option, reshaping the cornea will also provide the required refraction. People who are properly assessed before surgery to make sure they are appropriate candidates for the operation tend to have the greatest long-term outcomes from LASIK.
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