What is PRK Laser Vision Correction?

Laser vision correction is a surgical procedure used to correct the focus of the eye. An excimer laser is used to reshape the front part of the eye, known as the cornea, in order to correct nearsightedness (myopia) , farsightedness (hyperopia) and/or astigmatism. The excimer laser is essentially a light beam that is precise enough to sculpt into the side of a human hair.

There are two ways in which the laser energy can be applied: underneath a flap of corneal tissue (LASIK) or directly to the surface of the cornea (PRK). In the PRK procedure, surface cells are gently removed prior to application of laser treatment. The laser treatment itself is identical in LASIK and PRK. In certain patients a medication is briefly applied to the surface of the eye following laser treatment in order to aid in healing. A contact lens is used for 2 to 3 days after the procedure as the surface cells heal. This lens is handled only by the surgeon. While the healing time is longer with PRK compared to LASIK, the final results are the same with both procedures. Most patients are candidates for LASIK. PRK is particularly advantageous for patients with thin corneas or large pupils, as well as for patients who require a higher level of refractive correction who may not otherwise be candidates for LASIK.