1. A reference to the movements of the eyes; applied especially to the common motor nerves (or third pair of cranial nerves) which supply many of the muscles of the orbit.
2. Referring to or effecting movements of the eyes.

The third cranial nerve which is responsible for the nerve supply to the muscles around the eye, including the upper eyelid muscle, which raises the eyelid; the extraocular muscle, which moves the eye inward; and the pupillary muscle, which constricts the pupil.

Paralysis of the oculomotor nerve results in a drooping eyelid (ptosis), deviation of the eyeball outward (and therefore double vision), and a dilated (wide-open) pupil.