Photorefractive keratectomy (PRK) is a type of refractive laser surgery that reshapes the cornea to correct myopia (short-sightedness), hyperopia (farsightedness and astigmatism (unevenly curved cornea). It helps in decreasing or eliminating dependency on glasses or contact lens. The goal of a refractive surgery is to allow less dependency on glasses and contact lenses rather than achieve the complete absence of refractive error.
It is an elective procedure. It is done for patients who are tired of relying on their glasses or contact lenses. It is an ideal procedure for thin cornea, scarred cornea or irregularly-shaped cornea with lower refractive powers.
Anesthetic drops are applied to numb the eyes. Patient is asked to focus on the target light while the surgeon manually removes the top layer of the cornea. The excimer laser is performed over the mid-cornea which corrects the refractive power by reshaping it. A bandage contact lens is applied to the patient’s eye to decrease irritation and better healing. The contact lens will be removed 4-6 days postoperatively by your doctor.
The patient will gain his preoperative vision but without being dependent on glasses.
Written by: Dr. Ramya Sampath – Regional Head – Clinical Services, Chennai
You will feel a slight pressure on your eye during the surgery but it’s a painless procedure.
After 40 years of age, you will need reading glasses or if cataract develops, then distance glasses.
5 – 7 days after the procedure, you can start working normally.
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