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