Acronym for laser in-situ keratomileusis, which is a variety of surgery of the eye used to correct severe myopia. A thin flap of the cornea is lifted, the area underneath reshaped using an excimer laser, and the flap is then returned to its place, the altered contour of the cornea improving the patient’s sight.
LASIK stands for laser-assisted in-situ keratomileusis, an eye surgery where a laser reshapes the cornea, the clear front surface of the eye. This procedure addresses refractive errors like nearsightedness and astigmatism. During LASIK, a partial flap is created in the cornea, the underlying area is modified with a laser, and then the flap is repositioned.