LASIK, an acronym for Laser-Assisted In Situ Keratomileusis, is a surgical procedure performed on the eye by an ophthalmologist. Eye problems such as astigmatism are corrected via LASIK by reshaping the eye's cornea to eliminate or reduce irregularities in the shape of the eye.

LASIK surgery is performed in two steps.

First, a flap of corneal tissue is created using a mechanical microkeratome with a metal blade, or using a femtosecond laser microkeratome that creates a series of tiny closely arranged bubbles within the cornea. The flap is created in such a way that the top of the flap acts like a door hinge. The flap is lifted up and folded back on the hinge, thereby exposing the middle portion of the cornea.

Next, an excimer laser vaporizes tissue to reshape the cornea. The flap is then put back into place by the surgeon where it will remain in position via natural adhesion until healing is completed.

If you wear corrective eyeglasses or corrective contact lenses, LASIK surgery may be an alternative for you.