Results 151 to 160 of about 10,330 (198)
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Frequency analysis of accommodation, accommodative vergence and disparity vergence
Vision Research, 1973Abstract Engineering control analysis is used to gain some insight into the nature of the prediction operator and the synkinesis in the near response triad. The frequency characteristics of accommodation, accommodative vergence and disparity vergence systems are compared on a single subject.
V V, Krishnan, S, Phillips, L, Stark
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Vergence Adaptation and the Order of Clinical Vergence Range Testing
Optometry and Vision Science, 1995ABSTRACT When 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 ...
M, Rosenfield +3 more
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American journal of optometry and archives of American Academy of Optometry, 1968
ABSTRACT In normal binocular vision, accommodation and vergence cooperate to place on the fovea of each eye sharp image of the object of regard. Clinical measurements have long been interpreted as indicating that these two functions are stable and positively related to each other.
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ABSTRACT In normal binocular vision, accommodation and vergence cooperate to place on the fovea of each eye sharp image of the object of regard. Clinical measurements have long been interpreted as indicating that these two functions are stable and positively related to each other.
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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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Optometry and Vision Science, 1986
ABSTRACT The binocular visual field is the combined visual field obtained when the eyes are fixating a given point without head movements. The binocular field of fixation is the area within which central bifixation is possible by moving the eyes but not the head.
D D, Sheni, A, Remole
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ABSTRACT The binocular visual field is the combined visual field obtained when the eyes are fixating a given point without head movements. The binocular field of fixation is the area within which central bifixation is possible by moving the eyes but not the head.
D D, Sheni, A, Remole
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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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Fusional vergence in microstrabismus
Documenta Ophthalmologica, 1988The fusional vergence velocity was studied in microstrabismus and in normal persons. In microstrabismus the system works less precisely in that small changes in disparity produce no response, while it is possible that the difference between the amplitude of the stimulus and the amplitude of the response is greater.
Boonstra, F. N. +2 more
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Models of Vergence and Accommodation-Vergence Interactions
2002Vergence (or disjunctive) eye movements provide single vision by bringing the images of a bifixation target onto corresponding retinal points in the two eyes. When a target moves in depth, the brain recognizes the change in position of the retinal images and drives the extraocular muscles to bring these images into proper register on the retinas. Since
Bai-chuan Jiang +2 more
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The dynamics of vertical vergence
Experimental Brain Research, 1997We measured the gain and phase of vertical vergence in response to disjunctive vertical oscillations of dichoptic textured displays. The texture elements were m-scaled to equate visibility over the area of the display and were aperiodic and varied in shape so as to avoid spurious binocular matches.
I P, Howard, R S, Allison, J E, Zacher
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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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