ASTIGMATIC
astigmatic
(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
Source: WordNet® 3.1
Etymology
Adjective
astigmatic (comparative more astigmatic, superlative most astigmatic)
(medicine) Suffering from astigmatism.
Noun
astigmatic (plural astigmatics)
(medicine) One who has astigmatism.
Source: Wiktionary
As`tig*mat"ic, a. (Med. & Opt.)
Definition: Affected with, or pertaining to, astigmatism; as, astigmatic
eyes; also, remedying astigmatism; as, astigmatic lenses.
Source: Webster’s Unabridged Dictionary 1913 Edition