what is stigmatism
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Astigmatism is a common vision problem caused by an error in the shape of the cornea . With astigmatism, the lens of the eye or the cornea, which is the front surface of the eye, has an irregular curve. This can change the way light passes, or refracts, to your retina . This causes blurry, fuzzy, or distorted vision.
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a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus.
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