PRK: Photorefractive Keratectomy
laser corrective procedure like LASEK, PRK permanently changes the
shape of the anterior central cornea using a laser to remove a small
amount of tissue from the corneal stoma at the front of the eye. PRK
does not involve a knife, microkeratome, or cutting laser as used in
LASIK, but there may be more pain and slower visual recovery. Unlike
LASIK, PRK does not create the risk of dislocated corneal flaps and
does not cut as deeply into the cornea.