LASIK is an eye surgery that corrects short sightedness, far sightedness and astigmatism all of which are often caused by a focusing errors that can be corrected by changing the shape of the cornea. (A cornea can be too steep causing near sightedness, too flat causing far sightedness or football-shaped causing astigmatism.)
To reshape the cornea, a LASIK surgeon creates a protective flap of tissue in the outer layer of cornea and uses a laser to remove microscopic cells in the layer beneath. After just a few minutes, the surgeon is done and puts the flap back in place, which acts like a bandage as the patient’s eyes heal. In the months following LASIK eye surgery, the patient sees with improved vision.