Results 301 to 310 of about 55,627 (339)
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2003
Vergence eye movements refer to the binocular, nonconjugate, disjunctive ('fusional') movement of the eyes used to track objects moving in depth to maintain bifoveation and fused/single vision. They can be horizontal, vertical, and/or cyclorotary in nature.
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Vergence eye movements refer to the binocular, nonconjugate, disjunctive ('fusional') movement of the eyes used to track objects moving in depth to maintain bifoveation and fused/single vision. They can be horizontal, vertical, and/or cyclorotary in nature.
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Optometry and Vision Science, 1980
There is evidence to suggest that fusional vergence acts as a two-stage process consisting of fusion-initiating and fusion-sustaining components. The interrelationship of these components was examined by comparing the amplitude of disparity-induced vergence over the operating range of sustained fusional vergence.
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There is evidence to suggest that fusional vergence acts as a two-stage process consisting of fusion-initiating and fusion-sustaining components. The interrelationship of these components was examined by comparing the amplitude of disparity-induced vergence over the operating range of sustained fusional vergence.
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Nature, 1961
IT has been demonstrated1 that barbiturates influence conjugate eye movements selectively in that they abolish the smooth tracking movements while leaving the saccadic movements intact. Disjunctive eye movements have time characteristics akin to the tracking movements ; some effect of barbiturates on convergence has been mentioned2.
G, WESTHEIMER, C, RASHBASS
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IT has been demonstrated1 that barbiturates influence conjugate eye movements selectively in that they abolish the smooth tracking movements while leaving the saccadic movements intact. Disjunctive eye movements have time characteristics akin to the tracking movements ; some effect of barbiturates on convergence has been mentioned2.
G, WESTHEIMER, C, RASHBASS
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Vergence boundaries: an extension of the vergence concept
Journal of Structural Geology, 1982Abstract The difficulty in distinguishing between vergence changes on adjacent limbs of tight primary folds and the similar effects produced by non-coaxial refolding of primary folds by larger-scale folds is outlined. It is suggested that a distinction should be made between typical and atypical vergence boundaries.
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Why Do Patients with Impaired Vergence Not Show “Saccadic” Vergence?
Annals of the New York Academy of Sciences, 2009Low gain of the smooth‐pursuit system causes correcting saccades that are clinically observed as “saccadic pursuit.” In contrast, low gain of the vergence system during tracking does not appear to cause “saccadic tracking.” To further evaluate whether this clinical observation is caused by a missing interaction of vergence to step and ramp targets ...
Holger, Rambold +3 more
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Vergence Adaptation and the Order of Clinical Vergence Range Testing
Optometry and Vision Science, 1995When measuring horizontal relative vergence ranges, the conventional clinical procedure is to assess the base-in (or divergence) range before the base-out (or convergence) determination. The rationale for this order of testing is that the convergence responses stimulated during the base-out measurements may produce vergence adaptation (i.e., a fusional
M, Rosenfield +3 more
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Vision Research, 1972
Abstract A photographic technique has demonstrated that 60 per cent of unrestrained cats are capable of vergence movements during the examination of interesting near objects. The remaining cats showed no sign of vergence under the conditions of the experiment.
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Abstract A photographic technique has demonstrated that 60 per cent of unrestrained cats are capable of vergence movements during the examination of interesting near objects. The remaining cats showed no sign of vergence under the conditions of the experiment.
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Neural control of vergence eye movements: neurons encoding vergence velocity
Journal of Neurophysiology, 1986Single-unit recordings were made from midbrain areas in monkeys trained to make both conjugate and disjunctive (vergence) eye movements. Previous work had identified cells with a firing rate proportional to the vergence angle, without regard to the direction of conjugate gaze.
L E, Mays +3 more
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Fixation Disparity in Vertical Vergence
Ophthalmologica, 1982Generally, the vertical vergence response is smaller than the disparity that evokes it, even within the diplopia threshold. However, subjective and objective fixation disparity values obtained with Ogle's device agreed fairly well. The reference lines in themselves appeared to be a stimulus to align the eyes.
Houtman, W. A., van der Pol, B. A. E.
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Documenta Ophthalmologica, 1981
An experiment is described which qualitatively measures the state of accommodative vergence under binocular viewing conditions. Results show that under conditions of forced vergence, accommodative vergence maintains a value considerably different from vergence accommodation. These results indicated that accommodative vergence and vergence accommodation
J L, Semmlow, G K, Hung
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An experiment is described which qualitatively measures the state of accommodative vergence under binocular viewing conditions. Results show that under conditions of forced vergence, accommodative vergence maintains a value considerably different from vergence accommodation. These results indicated that accommodative vergence and vergence accommodation
J L, Semmlow, G K, Hung
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