noun

• 1Physiology
  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.’

  More example sentences

  • ‘Pure vergence movements, uncontaminated by saccades, occur when changing gaze between two targets, both lying straight ahead, but at different distances.’

• 2Geology
  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.’
  • ‘Previously, there has been disagreement over the direction of obduction of the ophiolite and the vergence of structures.’
  • ‘No structures are present in the Mount King Beds that show vergence.’