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What is R.K. or radial keratotomy?

Radial keratotomy or RK is a surgical procedure during which the periphery of the cornea is reshaped with a hand held diamond instrument. This effectively changes the shape of the central cornea allowing the image in the eye to be correctly focused on the retina. The center of the cornea is not involved in the surgery and left untouched. The number and length of the incisions determines the amount of correction achieved. These incisions are not visible to observers. During the past 20 years, millions of people around the world and in the U.S. have reduced their dependence on glasses and contacts with RK. RK is performed very little today as the laser is more accurate in most cases.

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