| 释义 |
vergence|ˈvɜːdʒəns|
[f. verge v.2 + -ence.]
1. Ophthalm. The simultaneous movement of both eyes towards or away from one another, as when they focus on a point that is nearer or farther away.
1902E. C. Ellett in Jrnl. Amer. Med. Assoc. 18 Oct. 969/2, I would suggest as a temporary table at least, a sort of composite arrangement, as follows: Movements of the visual axis... Associated disjunctive movements (vergences)..convergence..supervergence. 1940F. B. Chavasse in Ridley & Sorsby Mod. Trends Ophthalmol. xxvi. 280 By growth, extension, and refinement of this reflex is developed the proper vergence (notably convergence) of the eyes upon (say) the prey. 1979Sci. Amer. Jan. 88/1 Abrupt target jumps generate two types of eye movements: slow, smooth vergence eye movements..and sharp, rapid saccadic eye movements.
2. Geol. [ad. G. vergenz (H. Stille 1930, in Nachrichten von d. Ges. d. Wissensch. zu Göttingen, Math.-Physik. Klasse iii. 380).] The direction in which a fold is inclined or overturned.
1960Trans. Edin. Geol. Soc. XVIII. 51 Isoclinal recumbent folds with an average trend ENE-WSW; vergence SSE to NNW. [Note] The authors use the term ‘vergence’..to indicate the direction of overturning of folds. 1978Nature 7 Dec. 604/1 At the northern apex of the Tyrrhenian Sea, two mountain chains face each other displaying opposite vergence: the Corsican alpine chain and the Northern Apennines. |