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A visual defect in which the unequal curvature of one or more refractive
focusing clearly at one point on the retina, resulting in blurred vision.
CROSS SECTION PICTURE OF THE HUMAN EYE WITH ASTIGMATISM In the astigmatic eye, the cornea is oval, like an egg,
preventing light from correctly focusing on the retina.
CROSS SECTION PICTURE OF A NORMAL HUMAN EYE In the normal eye, the cornea
(the clear lens in the front of the eye)
is round, like a soccer ball, allowing light rays
to focus evenly on the retina
at the back of the eye.


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