Laser (or photorefractive keratotomy) is a type of refractive surgery, the purpose of which is to correct nearsightedness For farsightedness and astigmatism, PRK was the first type of laser eye surgery approved to correct vision and the type that preceded it. The popular LASIK procedure, although recovery from PRK takes a little longer than LASIK eye surgery, it is still performed PRK for vision correction
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