A: Photorefractive keratectomy (PRK) is a similar procedure to LASIK, usually performed when a patient is not a LASIK candidate due to a thin, steep or irregularly-shaped cornea. PRK reshapes the cornea’s surface instead of creating a corneal flap. Providing similar vision benefits, LASIK is often the preferred procedure simply due to quicker visual recovery and return to activities, as PRK requires a more extensive recovery.