1 Physiology The simultaneous movement of the pupils of the eyes toward or away from one another during focusing.
- In doing so, they perform saccadic movements, smooth pursuit movements, vergence movements, vestibular movements, and accommodation.
- Pure vergence movements, uncontaminated by saccades, occur when changing gaze between two targets, both lying straight ahead, but at different distances.
2 Geology The direction in which a fold is inclined or overturned: a zone of opposing fold vergence
More example sentences
- Fold and cleavage vergence varies across the domain, from SE through neutral to NW, although a majority verge SE.
- Major and minor folds with clear vergence relationships change their sense around the Rhoscolyn Anticline.
- A foreland fold-thrust belt with a southwestward vergence formed south of the Mazar-Kangxiwar fault.
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