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Photorefractive keratectomy (PRK) Concept: Photorefractive keratectomy (PRK) is a type of refractive surgery. This kind of surgery uses a laser to treat vision problems caused by refractive errors. You have a refractive error when your eye does not refract light properly. PRK is the first type of laser eye surgery for vision correction.it is a kind of laser eye surgery designed to change the shape of the cornea to eliminate (or reduce) the need for glasses and contact lenses. The laser is used to remove the outer layer of the cornea and flatten the cornea. https://www.hanxinclinic.com/index.php/2020/03/11/photorefractive-keratectomy-prk/