WordNet (r) 3.0 (2006):
astigmia n 1: (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people [syn: astigmatism, 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: astigmatism, astigmia] [ant: stigmatism]