'astigmatism' definitions:

Definition of 'astigmatism'

(from WordNet)
noun
(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people [syn: astigmatism, astigmia]
noun
(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point [syn: astigmatism, astigmia] [ant: stigmatism]

Words containing 'astigmatism'