‖ hemiaˈnopsia Path.
Also hemianopsy.
[mod.L., f. hemi- + Gr. ἀν- priv. + ὄψις sight.]
Half-blindness, being a loss of perception of one half the field of vision.
| 1883 Ophthalmic Rev. II. 82 The above named recent works on hemianopsia and the decussation of the optic nerve contain much of interest. 1884 Encycl. Brit. XVII. 785/1 Hemianopsia means loss of one-half of the visual field. 1885 Stirling tr. Landois' Hum. Phys. II. 786 When it is spoken of as paralysis of one-half of the retina, the term hemiopia is applied to it; when, with reference to the field of vision, the term hemianopsia is used. 1891 J. Hutchinson in Archives Surg. II. 303 Persisting vertical hemianopsia. 1893 Brit. Med. Jrnl. 18 Nov. 1107/1 There was..complete blindness of one eye and diminished vision, but no hemianopsia of the other. 1908 Practitioner Jan. 15 Attacks of aphasia, monoplegias, hemiplegias, word-blindness, and word-deafness, or hemianopsy. 1962 L. S. Sasieni Optical Dispensing viii. 200 Hemianopsia spectacles. |