Closed-loop and open-loop accommodative vergence eye movements

Saida, Shinya; Ono, Hiroshi; Mapp, Alistair P.

doi:10.1016/s0042-6989(00)00233-9

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…The details of Hering's law of identical visual direction or of his law of equal innervation are not at issue here. (For recent discussions of the eyes as sensors, see, e.g., Erkelens &van de Grind, 1994, andOno, Shimono, Saida, &Ujike, 2000; for the eyes as motor units, see Enright, 1992, andMapp, 2001.) Rather, the issue is that in order for the concept of a sighting-dominant eye to be useful in egocentric localization tasks, it must be incorporated into the generally accepted view of how the eyes work together to process visual direction or depth and/or how they move.…”

Section: Claim 4: the Sighting-dominant Eye Is The Egocentermentioning

confidence: 99%

What does the dominant eye dominate? A brief and somewhat contentious review

Mapp

Ono

Barbeito

2003

Perception & Psychophysics

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192

133

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Section: Claim 4: the Sighting-dominant Eye Is The Egocentermentioning

confidence: 99%

What does the dominant eye dominate? A brief and somewhat contentious review

Mapp

Ono

Barbeito

2003

Perception & Psychophysics

Self Cite

192

133

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“…Thus, the typical AB response patterns depend on the natural functioning of the BVS in RSVP protocols, which was hindered in Experiment 1, where vergence movements were inconsistent with binocular information. It can be argued that monoptic presentations facilitated the natural functioning of the BVS, even in monocular conditions, by providing consistent accommodative vergence movements [42], despite the absence of binocularly fused images. Consequently, visual attention could be effectively directed to monocular channels, despite the lower image acuity in monocular conditions.…”

Section: Discussionmentioning

confidence: 99%

Exploring Binocular Visual Attention by Presenting Rapid Dichoptic and Dioptic Series

Moreno-Sánchez,

Matsushima,

Aznar-Casanova

2024

Brain Sciences

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This study addresses an issue in attentional distribution in a binocular visual system using RSVP tasks under Attentional Blink (AB) experimental protocols. In Experiment 1, we employed dichoptic RSVP to verify whether, under interocular competition, attention may be captured by a monocular channel. Experiment 2 was a control experiment, where a monoptic RSVP assessed by both or only one eye determines whether Experiment 1 monocular condition results were due to an allocation of attention to one eye. Experiment 3 was also a control experiment designed to determine whether Experiment 1 results were due to the effect of interocular competition or to a diminished visual contrast. Results from Experiment 1 revealed that dichoptic presentations caused a delay in the type stage of the Wyble’s eSTST model, postponing the subsequent tokenization process. The delay in monocular conditions may be further explained by a visual attenuation, due to fusion of target and an empty frame. Experiment 2 evidenced the attentional allocation to monocular channels when forced by eye occlusion. Experiment 3 disclosed that monocular performance in Experiment 1 differs significantly from conditions with interocular competition. While both experiments revealed similar performance in monocular conditions, rivalry conditions exhibit lower detection rates, suggesting that competing stimuli was not responsible for Experiment 1 results. These findings highlight the differences between dichoptic and monoptic presentations of stimuli, particularly on the AB effect, which appears attenuated or absent in dichoptic settings. Furthermore, results suggest that monoptic presentation and binocular fusion stages were a necessary condition for the attentional allocation.

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Symmetrical horizontal vergence contributes to the asymmetrical pursuit of targets in depth

Maxwell

Schor

2004

Vision Research

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When a target travels slowly and smoothly along the line of sight of one eye, the eye that is aligned with the target remains stationary while the other eye adducts. The mechanism that is commonly invoked is that commands signaling conjugate pursuit and symmetrical vergence are combined. The two signals are in the same direction in the adducting eye but are in the opposite direction in the stationary eye and, so, cancel. Recent data have challenged this view and the idea that the two eyes are controlled independently has been resurrected. Pursuit and vergence movements are difficult to separate when they occur together because they have similar latencies and dynamics. We have developed a method where horizontal vergence is "tagged" by training it to have a vertical vergence component that can then be identified in combined pursuit-vergence movements. Four subjects trained eye movements to have a vertical vergence component by fusing vertical disparities that varied in association with horizontal convergence. Following training, the vertical vergence aftereffect was found whenever horizontal vergence was stimulated regardless of whether the horizontal vergence resulted from movement of the target in the midsagittal plane (symmetrical vergence) or from movement of the target along the line of sight of one eye (asymmetrical vergence). The vertical vergence aftereffect was never observed in association with conjugate movements indicating that asymmetrical slow eye movements are not controlled monocularly but contain a vergence component along with symmetrical smooth pursuit.

show abstract

Closed-loop and open-loop accommodative vergence eye movements

Cited by 5 publications

References 21 publications

What does the dominant eye dominate? A brief and somewhat contentious review

What does the dominant eye dominate? A brief and somewhat contentious review

Exploring Binocular Visual Attention by Presenting Rapid Dichoptic and Dioptic Series

Symmetrical horizontal vergence contributes to the asymmetrical pursuit of targets in depth

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