Saccades are rapid eye movements that turn both eyes in the same direction. Brainstem omnipause neurons gate saccades. Most natural shifts of the fixation point are between targets lying in different directions and at different distances requiring a combination of saccades and vergence. We investigated whether the visual stimulus, the saccadic command or the vergence command turns off omnipause...

Vergence eye movements were elicited in human subjects by applying disparities to square-wave gratings lacking the fundamental ("missing fundamental", mf). Using a dichoptic arrangement, subjects viewed gratings that were identical at the two eyes except for a phase difference of 1/4 wavelength so that, based on the nearest-neighbor matches, the features and the 4n+1 harmonics (5th, 9th, etc.) ...

PURPOSE The purpose of this study was to investigate the relationship between phoria and the dynamics of vergence eye movements as described by the ratio of convergence average peak velocity to divergence average peak velocity, termed the vergence peak velocity ratio. METHODS Phoria and vergence step responses were recorded. Three measures of phoria were assessed: baseline phoria, which is th...

Yang, D.-S., E. J. Fitzgibbon, and F. A. Miles. Short-latency inversely proportional to the square of the viewing distance. vergence eye movements induced by radial optic flow in humans: This raises a potential problem when the observer moves dependence on ambient vergence level. J. Neurophysiol. 81: 945– through a cluttered environment, such as a forest, for exam949, 1999. Radial patterns of o...

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purpose: to compare fusional vergence amplitudes in patients with symptomatic and asymptomatic near exophoria methods: this cross-sectional study included 102 patients with near exophoria and asthenopia and 86 with asymptomatic near exophoria, all of whom were aged 15-35 years and had best corrected far visual acuity better than 20/25. far and near fusional vergence amplitudes were evaluated in...

This paper describes the spatial trajectories of the binocular fixation point (the intersection point of the two lines of sight) during gaze-shifts within a horizontal plane of regard. Gaze was voluntarily shifted between pairs of real, continuously visible LED targets that were either iso-vergent at 5-25 deg convergence (conjugate version saccades) or differed in vergence angle (by 5-20 deg) a...

Saccades made between targets at optical infinity require both eyes to rotate by the same angle. Nevertheless, these saccades are consistently accompanied by transient vergence eye movements. Here we have investigated whether the dynamics of these vergence movements depend on the trajectory of the coincident conjugate movement, and whether moving the head during eye-head gaze shifts modifies ve...