Is an outpatient procedure used to treat nearsightedness, farsightedness and astigmatism. The surgery uses a laser to shape the cornea (the clear, round dome on the front of the eye) to improve the way the eye focuses light rays onto the retina at the back of the eye.
During the LASIK procedure, the ophthalmologist creates a thin layer on the cornea with a microkeratome or a laser beam. The surgeon bends the back layer and accurately removes a specific amount of corneal tissue beneath it, using an excimer laser. The layer is put back in place and heals by itself. In people with myopia, LASIK is used to flatten an abnormally steep cornea. In people with hyperopia, LASIK is used to achieve a steeper cornea. LASIK can correct astigmatism by molding an irregularly shaped cornea, making it smoother and normal.