Oculomotor nerve palsy, also known as third cranial nerve palsy, is a neurological condition characterized by the dysfunction of the third cranial nerve, which is responsible for controlling eye movement and pupil constriction. This can result in various symptoms, including drooping eyelids, double vision, and difficulty moving the eye in certain directions. It can be caused by various factors, such as head injury, brain tumor, aneurysm, or inflammation.