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Severe astigmatism is often genetically inherited or results from injury or from conditions such as keratoconus .
Overview Astigmatism (ah-stig-mah-tizm) is a common refractive vision condition that affects millions of people. It occurs most often when the cornea becomes oval shaped instead of spherical. The unequal curvature of the cornea scatters light entering the eye into two primary directions called meridians and pre...Read More