| a. | 1. | (Optics) Not astigmatic; free of astigmatism; - pertaining to a lens or lens system, and used especially of a lens system which consists of a converging lens and a diverging lens of equal and opposite astigmatism but different focal lengths, and sensibly free from astigmatism. |
| Adj. | 1. | anastigmatic - pertaining to a lens or lens system free of astigmatism (able to form point images) Synonyms: stigmatic |
| 2. | anastigmatic - not astigmatic Synonyms: stigmatic Antonyms: 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 |