Found 3 items, similar to Astigmatism.
English → Indonesian (quick) Definition: astigmatism penyakit mata
English → English (WordNet) Definition: astigmatism astigmatism n 1: (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea [syn: astigmia] 2: (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]
English → English (gcide) Definition: Astigmatism Astigmatism \A*stig"ma*tism\, n. [Gr. 'a priv. + ?, ?, a prick of a pointed instrument, a spot, fr. ? to prick: cf. F. astigmatisme.] (Med. & Opt.) A defect of the eye or of a lens, in consequence of which the rays derived from one point are not brought to a single focal point, thus causing imperfect images or indistinctness of vision. [1913 Webster] Note: The term is applied especially to the defect causing images of lines having a certain direction to be indistinct, or imperfectly seen, while those of lines transverse to the former are distinct, or clearly seen. [1913 Webster]