What is an astigmatism?

astigmatism: (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point

  • Answer provided by kgb agent Otto D on Wednesday, April 14 2010 at 10:39AM EDT
  • Source: wordnetweb.princeton.edu/...