has part has part has_part characteristic of has modifier abnormal oculomotor nerve morphology absent oculomotor nerve absent CN-III nerve MP:0001062 MPheno.ontology absence of the third cranial nerve, which normally sends motor fibers to the levator muscles of the eyelid and to the superior rectus, inferior rectus, and inferior oblique muscles of the eye absence of oculomotor nerve abnormal absent oculomotor nerve