Results 261 to 270 of about 12,598 (296)
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Documenta Ophthalmologica, 1986
The present review aims to discuss the current researches on the ability of the vergence system to adjust to new information. A concomitant or non-concomitant binocular retinal disparity caused by a prism or an anisometropic prescription can be adapted to such that the induced phoria of fixation disparity reduces back to the original value.
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The present review aims to discuss the current researches on the ability of the vergence system to adjust to new information. A concomitant or non-concomitant binocular retinal disparity caused by a prism or an anisometropic prescription can be adapted to such that the induced phoria of fixation disparity reduces back to the original value.
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The Electromyography of Vergence Movement
Archives of Ophthalmology, 1959In a previous report 1 a difference was described between the electromyographic pattern of version and convergence movement. The version, or saccadic, movement was shown to be associated with a sudden short discharge of larger motor units immediately followed by a regular pattern of lower amplitude. Corrective secondary bursts are often introduced upon
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A.M.A. Archives of Ophthalmology, 1958
When the normal observer fixates with one eye from far to near 1 or suddenly accommodates through a minus lens, 2 the occluded eye moves nasalward. The basic physiology of this synkinesis is still not well understood. 3 Clinicians 4,5 seem to be convinced that the associated vergence is related to the accommodative effort , but Christoferson and Ogle 6
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When the normal observer fixates with one eye from far to near 1 or suddenly accommodates through a minus lens, 2 the occluded eye moves nasalward. The basic physiology of this synkinesis is still not well understood. 3 Clinicians 4,5 seem to be convinced that the associated vergence is related to the accommodative effort , but Christoferson and Ogle 6
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Fixation Disparity in Vertical Vergence
Ophthalmologica, 2010Generally, 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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AN INVESTIGATION OF VOLUNTARY VERGENCE
American journal of optometry and archives of American Academy of Optometry, 1971Vergence rotation of the eyes around the vertical axes can be produced by a conscious willed effort. Investigation of this vergence component indicates that voluntary vergence is produced through the stimulation of accommodative vergence.
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American journal of optometry and physiological optic, 1980
ABSTRACT A proposal to name the dominant aspect of vergence “disparity vergence” is put forward. Support for this proposal is gathered by briefly reviewing the components of vergence: (1) disparity vergence, the visual feedback control system for removing binocular disparity with an appropriate binocular ...
L, Stark +3 more
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ABSTRACT A proposal to name the dominant aspect of vergence “disparity vergence” is put forward. Support for this proposal is gathered by briefly reviewing the components of vergence: (1) disparity vergence, the visual feedback control system for removing binocular disparity with an appropriate binocular ...
L, Stark +3 more
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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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The Nature of Vergence Revealed by Electromyography
A.M.A. Archives of Ophthalmology, 1957This paper is one of a series of studies in vergence investigated by means of electromyography, parts of which have been previously reported. 1,2 The present study is concerned with accommodative and fusional vergence. The technique has been fully described in previous reports.
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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
ABSTRACT 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 ...
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ABSTRACT 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 ...
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