has part has part has_part characteristic of part of has modifier abnormal trigeminal nerve morphology abnormal ophthalmic nerve morphology MPheno.ontology any structural anomaly of the sensory nerve subdivision of the trigeminal nerve that transmits sensory information from the orbit and its contents, the nasal cavity and the skin of the nose and forehead abnormal CN V1 MP:0009798 abnormal V1 nerve morphology morphology abnormal ophthalmic nerve