as·tig·mat·ic /ˌæstɪgˈmætɪk/
  (a.)亂視的;散光的
  as·tig·mat·ic /ˌæstɪgˈmætɪk/ 形容詞
  散光的
  As·tig·mat·ic a. Med. & Opt. Affected with, or pertaining to, astigmatism; as, astigmatic eyes; also, remedying astigmatism; as, astigmatic lenses.
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  astigmatic
       adj : of or relating to a defect in the eye or in a lens caused by
             a deviation from spherical curvature which prevents
             light rays from meeting at a common focus and so
             results in distorted images [ant: anastigmatic]