astigmatic Meaning, Definition & Usage

  1. adjective 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

WordNet

As`tig*mat"ic adjective
Definitions
  1. (Med. & Opt.) Affected with, or pertaining to, astigmatism; as, astigmatic eyes; also, remedying astigmatism; as, astigmatic lenses.

Webster 1913