ASLA, previously known as PRK, is similar to LASIK but does not involve the creation of a flap of corneal tissue.
Instead, just the surface cells are removed from the cornea. The excimer laser then applies a computer-generated contour to permanently reshape the cornea.
At the end of the procedure, a clear contact lens is placed over the eye to protect the cornea as the surface cells regrow. Both eyes are usually treated on the same day. The contact lenses are removed from the eyes after 5 days. Most patients are able to resume normal activities one week after their procedure and vision continues to improve for some weeks following surgery.