Sensory System


What is astigmatism?

Astigmatism is an irregularity in the curvature of the cornea or lens that causes light traveling in different planes to be focused differently. The normal cornea or lens has a spherical curvature like the inside of a ball. In astigmatism, the cornea or lens has an elliptical curvature, like the inside of a spoon. As a result, some portions of an image are in focus on the retina, while other portions are blurred and vision is distorted.


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