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PRK and Lasik Laser EyePRK and Lasik Laser EyePRK is considered to be the original Laser eye surgery. PRK stands for photorefractive keratectomy and it used to be the most common refractive surgery procedure. PRK is actually grouped under the Laser Eye Surgery procedures itself. With PRK, the improvement has often seen to be gradual and over a few days or months but many surgeons prefer PRK for patients with larger pupils or thin corneas. PRK is performed with an excimer laser, which uses a cool ultraviolet light beam to precisely remove very tiny bits of tissue from the surface of the cornea in order to reshape it. When you reshape the cornea in the right way, it works better to focus light into the eye and onto the retina, providing clearer vision than before. Both nearsighted and farsighted people can benefit from PRK. With nearsighted people, the goal is to flatten the too-steep cornea; with farsighted people, a steeper cornea is desired. Also, excimer lasers can correct astigmatism, by smoothing an irregular cornea into a more normal shape.
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