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Definition
The term vergence in the context of biological vision refers to a type of eye movement seen in creatures which possess binocular vision. Vergence is the simultaneous movement of both eyes in opposite directions that is required to maintain single binocular vision. When the eyes are looking at a nearby object or fixates on a nearby object, the eyes must rotate toward each other. This is referred to as convergence. Similarly, when the eyes look at an object farther away, they rotate away from each other which is referred to as divergence.
Other Properties
Vergence causes the direction or viewing angle of the two eyes to change such that the image projects to the center of the retina in both eyes. As can be seen in Fig. 1, the angle of convergence is larger when the eye is fixated on nearby objects. In humans, this convergence is caused by the contraction of the medial rectus muscles which pulls the eye toward the...
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Sinha, S.N. (2021). Vergence. In: Computer Vision. Springer, Cham. https://doi.org/10.1007/978-3-030-03243-2_807-1
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DOI: https://doi.org/10.1007/978-3-030-03243-2_807-1
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