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Astigmatism

Astigmatism is caused by the front of the eye (the cornea) and occasionally the lens, being irregular in shape. It is often described as having rugby ball shaped eyes. This means that the image in one direction (eg horizontal) is focused at a different distance from the retina than one in the other direction (eg vertical). It is easy to correct this with a lens that gives different magnifications in the two directions. Unfortunately it is more difficult to do this in a contact lens than a spectacle lens but it is not impossible

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