ASTIGMATISM • FREE TRANSLATOR.ORG • Definition of Astigmatism

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/əstˈɪgmətˌɪzəm/ Listen

Astigmatism

noun

(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people. Synonym: astigmia.

(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point. Synonym: astigmia.

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Etymology of 'Astigmatism'

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"Astigmatism" Quotes from Famous Books

... new life to the convalescent, despite his occasional attacks of theological astigmatism. And these attacks grew less frequent and less marked as the poor bones once more involved themselves in firm flesh—to the glad relief of a harried and scandalised old gentleman whose black forebodings ...

— The Seeker • Harry Leon Wilson

... was evidently great effort made. (Several of these functional findings, however, have varied from time to time in the ensuing years.) Hearing normal. Ocular examination showed hypermetropia 1.5 D. R. and L. with marked astigmatism. Fields and color vision normal. Left pupil about twice the size of the right. (A competent oculist could find no evidence of organic affection of the nervous system correlated with this.) Shape of head normal. Bowels regular. Appetite capricious. When first seen ...

— Pathology of Lying, Etc. • William and Mary Healy

Words linked to "Astigmatism" : ametropia, condition, status, keratectasia, astigmia, astigmatic, optics, keratoconus, stigmatism, ophthalmology