astigmia [ ə'stiɡmiə ]

• n.
  • (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea

    同义词： astigmatism

  • (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point

    同义词： astigmatism

以上来源于: WordNet