Also found in: Thesaurus, Medical, Encyclopedia.


Free from astigmatism. Used of a compound lens in which the separate components compensate for the astigmatic effects of each lens.


(General Physics) (of a lens or optical device) not astigmatic. Also: stigmatic


(ˌæn ə stɪgˈmæt ɪk, æˌnæs tɪg-)

(of a lens) not having astigmatism; forming point images of a point object located off the axis of the lens; stigmatic.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.anastigmatic - pertaining to a lens or lens system free of astigmatism (able to form point images)anastigmatic - pertaining to a lens or lens system free of astigmatism (able to form point images)
2.anastigmatic - not astigmaticanastigmatic - not astigmatic      
astigmatic - 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
References in periodicals archive ?
The belligerents on both sides had been constantly improving their method of aerial photography, and in their efforts to combine a large image with a short exposure had produced large fast anastigmatic lenses with a wide covering power, admirably suited to the more peaceful pursuit of celestial photography'.
Gradually, his techniques and use of new devices in the studio evolved, including new backdrops with painted columns and gray landscapes, a wall of blue glass, European furniture, and two bellows cameras with anastigmatic lenses.