Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

the third cranial nerve, that consists of both sensory and motor fibers and innervates most of the muscles correlated with accommodation and movement of the eye and restriction of the pupil. Commonly referred to as cranial nerve III.

OCULOMOTOR NERVE: "Severing of occulomotor nerves may render the individual unable to focus on targets, and may result in vision loss."

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