The PRK Procedure

(Image by KO Studios)

PRK (Photorefractive keratectomy) was the first Excimer Laser Procedure approved to correct near-sightedness. Although LASIK has become the most common laser procedure performed today, PRK may still be a more appropriate choice for some candidates. Dr. Watkins will discuss with you the best choice for you dependant on measurements and the testing of your eyes. 

The cornea consists of different layers of tissue. The surface layer, called epithelium, is removed before the laser is used to reshape the underlying tissue. By modifying the shape of the cornea, the light rays can focus properly on the retina to provide clear vision. After the procedure the epithelium heals back and becomes smooth again to allow clear vision.  The process of regenerating the epithelium typically takes between a few days to a week. A bandage contact lens is worn during this period to aid in comfort and vision. Usually several days of healing is required to achieve good functional vision after PRK, patients can see immediately after surgery, but the vision isn’t clear. During the healing period, side effects may include light sensitivity, glare, halos and drier eyes.

Patients should expect mild to moderate discomfort following PRK and allow several days before returning to work. After four to six weeks most side effects have disappeared, however complete visual stabilization may take six months. Anti-inflammatory and antibiotic drops are used after surgery.

PRK is the required procedure for some of the armed forces and other governmental agencies.