anastigmatic vs astigmatic

anastigmatic and astigmatic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
anastigmatic	No	Yes	No	No
astigmatic	No	Yes	No	No

anastigmatic (adjective)	astigmatic (adjective)
not 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
pertaining to a lens or lens system free of astigmatism (able to form point images)