vergence

About 0.20 uses per million words.

Meaning

1. noun The simultaneous turning of both eyes when focusing. .mw-parser-output .defdate{font-size:smaller}
2. noun A measure of convergence or divergence of rays.
3. noun The direction of the overturned component of an asymmetric fold.

Similar words

fusional accommodative convergence version incyclovergence cross-eye orthophoria emmetropy focus isoametropia

Often followed by

of and eye movements is system angle in movement