单词 | hippus |
释义 | hippusn. Medicine. Originally: any of various conditions involving abnormal movement of the eyes or eyelids; esp. nystagmus. In later use: spec. rhythmic constriction and dilatation of the pupil, independent of the level of illumination. ΘΚΠ the world > health and disease > ill health > a disease > disorders of eye > [noun] > disorders of iris hippus?1587 synechia1745 iritis1818 coloboma1843 iridencleisis1855 irideremia1855 aniridia1860 choroido-iritis1869 iridoplegia1878 rubeosis1934 ?1587 A. H. tr. J. Guillemeau Worthy Treat. Eyes (new ed.) iii. ii. 37 Hippos [Fr. Hippos] is an affection of the eye comming in at the first framing, and from the birth of the party wherein the eyes cannot abide in one place, but are alwaies shaking. 1662 W. Firth Saints Monument 53 Some [enemies] aim at the head..; others as many at least at the eye; such as are Amaurosis, Glaucoma, Hypopyon, Crithe, Hippos, Milphosis, and the like. 1729 B. Duddell Treat. Dis. Horny-coat of Eye iii. vii. 174 She had Hippus's on the Balls of her Eyes, yet the Movement of the Pupils was very good. 1793 W. Rowley Rational Pract. Physic III. 236 Hippus Is a repeated dilatation and alternate constriction of the pupil. 1839 Lancet 29 Apr. 193/1 The complications of cataract in these twenty-nine cases were as follows:—in 2 lachrymation; in 1 entropium..; in 2 hippus and nystagmus [etc.]. 1854 Abstr. Papers Royal Soc. 1850–54 6 155 Hippus, and the motions of the iris which are observed, especially in amaurotic children, are alluded to as motions independent of the light, and consequently, of the retina and sensorium. 1889 A. H. Buck Ref. Handbk. Med. Sci. VII. 59/2 Tonic contraction of the pupil of the eye is called myosis spastica; clonic contraction hippus. 1932 S. Duke-Elder Text-bk. Ophthalmol. I. xii. 563 In the condition of hippus a rhythmic contraction and dilatation of the pupil occurs regularly a definite number of times per minute. 1968 J. L. Smith Neuro-ophthalmol. IV. iv. 60 No satisfactory explanation has been given for hippus as yet. 2007 Computing (Nexis) 19 Apr. 23 An iris recognition system should look for the hippus movement—the constant shifting and pulse that takes place in the eye. This entry has been updated (OED Third Edition, March 2018; most recently modified version published online March 2022). < n.?1587 |
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