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The person who is nearsighted or farsighted suffers from refractive error. Her cornea is not shaped correctly, which affects how she sees at a distance or close up. PRK can correct some of this refractive error.
PRK Surgery on Refractive Error
Photorefractive keratectomy, or PRK, uses an eximer laser to correct refractive errors in patients. PRK has a 95 percent success rate according to the Food and Drug Administration.
Reshape the Cornea
PRK is used to reshape the cornea of the patient whose vision is impacted by an inborn refractive error. The eximer laser removes microscopic amounts of corneal tissue from the outside of the cornea.
Refractive Error
The eyes focus light on the retina incorrectly, which causes the refractive disorder. Light doesn't focus on the right spot inside the retina and, as a result, vision is blurred. The person is either farsighted or nearsighted.
PRK
PRK corrects "moderate" nearsightedness, farsightedness and astigmatism. PRK changes the shape of the cornea, which will change how the light reflects onto the retina after surgery.
Risks
The patient will experience a glare or halo around lights, and this effect will continue for several months until the cornea is fully healed. He will also experience what is called mild "corneal haze". His vision might be undercorrected or overcorrected.
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