WordNet (3.0) WordNet (3.0)
(n) (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people, Syn. astigmia
(n) (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point, Syn. astigmia, Ant. stigmatism
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