LASIK reshapes the cornea, the clear, rounded surface of the eye, so it does a better job of focusing the light that enters the eye. The eyeball is held in place by a suction ring and the cornea is lifted and flattened. The surgeon cuts a small, hinged flap in the cornea and folds it back. Then an excimer laser — an ultraviolet light beam — reshapes the cornea based on your pre-op eye exam. The corneal flap is folded back in place.
