vergence


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vergence

 [ver´jens]
disjunctive movement of the eyes in opposite directions in adjusting to near or far vision; convergence or divergence.

ver·gence

(ver'jĕnts),
A disjunctive movement of the eyes in which the fixation axes are not parallel, as in convergence or divergence.
[L. vergo, to incline, to turn]

vergence

/ver·gence/ (ver´jens) a disjunctive reciprocal rotation of both eyes so that the axes of fixation are not parallel; the kind of vergence is indicated by a prefix, e.g., convergence, divergence.

vergence

(vûr′jəns)
n.
1. A measure of the convergence or divergence of a pair of light rays, defined as the reciprocal of the distance between a point of reference and the point at which the rays intersect.
2. The inward or outward turning of one or both eyes that occurs when focusing on an object.

vergence

[vur′jəns]
movement of the eyes in opposite directions (convergence and divergence).

ver·gence

(vĕr'jĕns)
A disjunctive movement of the eyes in which the fixation axes are not parallel, as in convergence or divergence.
[L. vergo, to incline, to turn]

vergence

1. Movement of one or both eyes so that the visual axes converge or diverge.
2. The effect caused on a parallel beam of light by a convex (converging) or concave (diverging) lens.

vergence 

1. Denotes divergence of light travelling from, or convergence of light travelling from, or to an object or image. The

vergence

disjunctive movement of the eyes in opposite directions in adjusting to near or far vision; convergence or divergence.
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The training involved all three main oculomotor subsystems: vergence, accommodation, and version.
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Functional Classes of Eye Movements Class of Eye Movement Main Function Gaze-Holding Visual Fixation Holds the image of a stationary object on the fovea Vestibulo-ocular reflex Holds images of the seen world steady on the retina during brief head rotations Optokinetic Holds images of the seen world steady on the retina during sustained and low frequency head rotations Gaze-Shifting Smooth Pursuit Holds the image of a moving target close to the fovea Nystagmus quick phases Resets the eyes during prolonged rotation and directs gaze towards the oncoming visual scene Saccades Directs images of eccentrically located objects of interest onto the fovea Vergence Moves the eyes in opposite directions so that images of a single object are place simultaneously on both foveas
Individuals with brain injury may manifest a range of vergence abnormalities such as convergence insufficiency, slowed dynamic responses and restricted relative ranges.
In this article, only the oculomotor system subcomponent of vergence is considered.
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