During laser eye surgery, a surgeon uses a laser device to make permanent changes to the shape of the cornea. First our Lasik eye surgeon uses either a mechanical surgical tool called a microkertome or a femtosecond laser to create a thin circular flail in your cornea. Your vision is corrected instantly day after LASIK Laser eye surgery. Our LASIK surgeon then folds back the hinged flap to access the original cornea and removes a little corneal tissue using an excimer laser. A large part of the eye's ability to focus depends on the shape of your cornea, the obvious front surface of your eye. All of these situation are caused by problems with the way the eye focuses an image on your retina, which is the light-sensitive layer at the back of your eye. After the laser reshapes your cornea, the flap is then lay back in place, covering the area where the corneal tissue was detached. Then the cornea is allowed to cure naturally. Laser eye surgery requires only relevant anesthetic drops, and no bandages or stitches are necessary. Surgically altering the shape of the cornea can correct mild to moderate refractive errors in most people. The cornea is then peeled back and the underlying corneal tissue is reshaped using a new laser.