LASIK eye surgery can be an alternative to glasses or contact lenses done for the correction of certain common vision problems.
LASIK (laser-assisted in situ keratomileusis) is a type of laser refractive surgery — the best known and most commonly performed. In general, a special type of cutting laser is used to precisely change the shape of your cornea — the dome-shaped transparent tissue at the front of your eye — to improve vision.
Normally, images are clearly focused on the retina in the back of your eye because the light rays are bent properly to contact the retinal surface. With nearsightedness (myopia), farsightedness (hyperopia) or astigmatism, the light is bent incorrectly and it ends up being focused elsewhere, resulting in blurred vision. Traditionally, the blurred vision is corrected by bending (refracting) light rays with glasses or contact lenses. But reshaping the cornea itself also will provide the necessary refraction.