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stigmatism

Stigmatism, another word for astigmatism, is a condition of the eye or lens where rays of light from a single point do not focus upon on a single point on the retina. (noun)

An example of stigmatism is when the cornea of the eye is shaped like a football, not round as it should be, causing rays of light to focus in front of or behind the retina.

See stigmatism in Webster's New World College Dictionary

See stigmatism in American Heritage Dictionary 4

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stigmatism

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