Astigmatism refers to a type of vision difficulty that is the result of an irregular curvature of the cornea or abnormalities in the lens of the eye. This is a refractive error that causes light to focus irregularly on the lens of the eye. Astigmatism causes distortions or blurriness of vision and it is believed to have genetic roots. It can be corrected through the use of glasses, contact lenses, or surgery.

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