Oculomotor nerve

cranial nerve III, for eye movements

Anisocoria is a condition characterized by an unequal size of the eyes' pupils. Affecting up to 20% of the population, anisocoria is often entirely harmless, but can be a sign of more serious medical problems.

one of two nuclei of the oculomotor nerve

parasympathetic ganglion located just behind the eye in the posterior orbit

Human disease

nucleus in a brain

reflex action of the eye, in response to focusing on a near object, then looking at a distant object