IPA: //əˈstɪɡmətɪk//
KK: /əˈstɪɡmətɪk/
Having a condition where the eye does not focus light evenly on the retina, causing blurred or distorted vision.
The doctor said my astigmatic vision could be corrected with glasses.
Astigmatic is formed from "a-" (meaning without) and "stigmatos" (Greek for mark or point). The word describes a condition where there is a lack of a single point of focus, hence, without a clear mark or point.
Think of 'without' ('a-') a clear 'mark' ('stigmatos') to remember that astigmatic refers to a vision condition lacking a single point of focus.