| 释义 |
sursum-|sɜːsəm-|
formative element [f. L. sursum from below, up] used in terms in Ophthalm., as sursumˈduction [a. F. sursumduction (G. T. Stevens 1886, in Arch. d'Ophtalm. VI. 545): see duction], vertical movement upwards of one eye alone; the degree to which this action occurs; sursumˈvergence [L. vergentia (f. vergere to bend, turn): see -ence], the simultaneous movement of one eye upwards and the other downwards, classified as left or right according to which eye moves upward; the degree to which this motion occurs; sursumˈversion [L. version-em, f. vertere to turn: see -ion], the parallel upward movement of both eyes.
1893G. E. de Schweinitz Dis. Eye ii. 76 *Sursumduction, or the power of uniting the image of the candle flame, seen through a prism placed with its base downward before one eye, with the image of the same object as seen by the other eye, is ascertained by beginning the trial with a weak prism..and gradually increasing its strength. 1949S. Duke-Elder Text-bk. Ophthalm. IV. xlv. 3814 Depending on whether the [eye] movement is in, out, up or down, the terms adduction, abduction, supraduction (sursumduction) and infraduction (deorsumduction) are employed. 1975M. M. Parks Ocular Motility & Strabismus xviii. 149/1 Dissociated double hyper⁓deviation is synonymous with alternating sursumduction which describes the upturning movement of each eye as the cover-uncover test is performed.
1897A. Duane New Classification of Motor Anomalies of Eye 38 The *sursumvergence, i.e., the amount by which the eyes can diverge in a vertical plane, is determined by the strength of prism placed up or down before the eyes, which the latter can overcome when looking at a distant object. 1962H. W. Brown in G. M. Haik Strabismus (Symposium N. Orleans Acad. Ophthalm.) xii. 243 The normal limits of sursumvergence are small. 1974Burian & von Noorden Binocular Vision & Ocular Motility xiii. 207/2 In some texts the normal limits for distance fixation are given as..3Δ to 4Δ for sursumvergence and deorsumvergence.
1897A. Duane New Classification of Motor Anomalies of Eye 68 Explanation of the conditions..may be had by assuming a weakness of deorsumversion in the former case and of *sursumversion in the latter. 1975M. M. Parks Ocular Motility & Strabismus ii. 14/2 Vertical versions are supraversion (sursumversion) and infraversion (deorsumversion). |