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A patient with short-sightedness can clear see objects up close, but not at a distance. A patient with long sightedness has the opposite problem; objects both up close and the distance will appear blurred. Astigmatism is an imperfection in the curvature of the eye, which causes vision to be blurred at all distances.In each case, the goal is to reduce a patient’s dependence on glasses.The treatment is most commonly performed for short-sightedness.

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