Third nerve palsy, or oculomotor nerve palsy, is a neurological condition characterized by weakness or paralysis of the third cranial nerve (oculomotor nerve). This nerve is responsible for controlling most of the eye's movements, including the constriction of the pupil, maintaining an open eyelid, and enabling the eye to move upwards, downwards, and inward. In pediatrics, this condition can significantly impact a child's vision and eye function.