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Wiktionary
astigmia

n. astigmatism

WordNet
astigmia
  1. n. (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea [syn: astigmatism]

  2. (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point [syn: astigmatism] [ant: stigmatism]