Photorefractive Keratectomy (PRK) Eye Surgery
Photorefractive keratectomy, or PRK, is a type of laser eye surgery used to correct mild to moderate nearsightedness , farsightedness and/or astigmatism . PRK is indicated for moderate to higher degrees of myopia and for myopes with corneal thickness insufficient for LASIK.
All laser vision correction surgeries work by reshaping the cornea, or clear front part of the eye, so that light traveling through it is properly focused onto the retina located in the back of the eye. There are a number of different surgical techniques used to reshape the cornea. During PRK, an eye surgeon uses a laser to reshape the cornea. This laser, which delivers a cool pulsing beam of ultraviolet light, is used on the surface of the cornea not underneath a flap of the cornea, as in LASIK.
What Are the Advantages of PRK?
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PRK is highly accurate in correcting many cases of nearsightedness. Approximately 80% of PRK patients have 20/20 vision without glasses or contact lenses one year after the surgery; 95%-98% have 20/40 or better without glasses or contacts.
What Are the Disadvantages of PRK?
Disadvantages of PRK include: