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What is Photorefractive Keratectomy?

Last updated 6 years ago


Photorefractive Keratectomy, or PRK, is a type of laser eye surgery for people who suffer from nearsightedness (myopia), farsightedness (hyperopia) or astigmatism. It is similar to LASIK in that it involves using the Excimer laser to reshape the cornea to minimize or eliminate your dependence on eyeglasses or contact lenses.  It is different in that unlike LASIK, the eye surgeon doesn't need to use a microkeratome to make a flap, but instead is able to apply the laser directly to the surface of the cornea to achieve the desired vision correction effect. PRK is better suited for people with thin corneas or certain other corneal abnormalities where using a microkeratome might not be the best choice. Also it may be preferred for those in the United States military where PRK is the approved procedure for those in active combat and certain other positions. PRK has been approved by the FDA for myopia since 1995 and for hyperopia since 1998 and enjoys an excellent safety profile. Since it does not use a microkeratome, there is no risk of flap complications.

In PRK to correct myopia, the steep cornea is made flatter by removing tissue from the center of the cornea. To correct hyperopia, the flat cornea is made steeper by removing tissue from the outer edges of the cornea. To correct astigmatism, the cornea is transformed into a more spherical shape.

If you’re interested in learning more about LASIK eye surgery, then call Clear Advantage at (603) 379-6817 now. We use the latest ground-breaking technology and equipment so that we can provide the best eye care for our patient’s eyes. Visit our website to get more information on how we can improve your vision and the way you experience your life.


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