astigmatic, a. Phys.
(æstɪgˈmætɪk)
[f. Gr. ἀ priv. + στίγµα, -µατ- point + -ic.]
1. Pertaining to or characterized by astigmatism.
| 1849 Todd Cycl. Anat. & Phys. IV. 1468/2 An astigmatic lens. 1879 G. C. Harlan Eyesight vi. 82 The astigmatic cornea..has different curvatures in directions at right angles to each other. |
2. Of an artificial lens: correcting astigmatism.
| 1881 Ophthalmic Rev. Nov. (Advt.), Every description of Astigmatic, Cylindrical and Sphero-Cylindrical Spectacle Lenses. 1958 Listener 6 Nov. 728/2 This distortion is immediately removed if his pictures are photographed through a one-degree astigmatic lens at an axis of fifteen degrees off the vertical. |