vergence

noun Ophthalmology.

1. the turning motion of the eyeballs toward or away from each other.Compare convergence(def 4), divergence(def 3).

noun

1. the inward or outward turning movement of the eyes in convergence or divergence

n.

1902, from verge + -ence.

n.

1. A disjunctive movement of the eyes in which the fixation axes are not parallel.