Photorefractive keratectomy (PRK) is a type of laser refractive surgery that corrects problems like hyperopia, myopia and astigmatism. PRK is the first eye surgery that used lasers to correct the vision of the patients. Some eye surgeons of today prefer PRK over LASIK due to its accuracy.
Over the years, LASIK/SMILE has surpassed PRK in popularity. However, the advantages of the procedure that has kept it relevant even today. The procedure is used in patients with thin corneas.