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AstigmatismWhat is astigmatism? Astigmatism, a condition in which objects at all distances appear somewhat indistinct and distorted rather than sharp and clear, is caused by a misshaped cornea. Because the curve of the cornea is uneven or warped instead of an even curve, the light rays are not refracted equally in all directions. As a result, a single focus point on the retina is not achieved and distorted vision occurs. 
With astigmatism, a misshaped cornea causes light rays to be focused at several points, causing distorted vision.
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