Keratomileusis is a surgical procedure to improve of the refractive state of the cornea. During this surgery a thin hinged flap of the front of the cornea is cut and lifted up. Then, the shape of the cornea is changed by using an excimer laser or other surgical device, and was developed by José Ignacio Barraquer, commonly called "the father of modern refractive surgery". A microkeratome is usually used to cut the flap, but a femtosecond laser can also be used to make the flap. Before the advent of the excimer laser, keratomileusis was performed using a cryolathe, which froze thin flaps of corneal tissue and lathe cut them much like one cuts the lens of a pair of glasses. After thawing, these reshaped flaps were placed under the front flap to correct visual improvement. LASIK is currently the only commonly performed keratomileusis procedure.
Sub Bowman's Keratomileusis (Video)