astigmatismPronunciation: /əˈstɪgmətɪz(ə)m/Translate astigmatism | into Italian Definition of astigmatism noun [mass noun] a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus. Derivatives astigmaticPronunciation: /astɪgˈmatɪk/ adjective Origin: mid 19th century: from a-1 'without' + Greek stigma 'point' + -ismastigmatism in other Oxford dictionaries Definition of astigmatism in the US English dictionary
