Photorefractive keratectomy (PRK) is a laser eye surgery that corrects nearsightedness, farsightedness, and astigmatism by reshaping the cornea. The procedure was first approved by the FDA in 1996 and studies have shown that 94 percent of patients experience longterm improvement of their vision after PRK surgery.
The biggest difference between PRK surgery and LASIK surgery is that PRK does not involve the creation of a corneal flap. In a PRK procedure, the surgeon removes the epithelium, or the outer layer of the cornea, entirely in order to access the stroma, or inner layer of the cornea. After the surgery, patients are provided with a specialized contact lens that acts like a bandage so the epithelium can naturally heal and grow back.
The different surgical approach to PRK makes it a better option than LASIK for patients with thin corneas, certain corneal conditions, or professions or hobbies that put them at high risk of damaging a corneal flap.
Photorefractive keratectomy can give patients 20/20 vision or better.