Visual field defect Hemianopia true true SNOMEDCT_US:77674003 peter Hemianopsia https://www.ncbi.nlm.nih.gov/pubmed/30068811 MSH:D006423 Partial or complete loss of vision in one half of the visual field of one or both eyes. 2013-10-13T07:55:21Z UMLS:C0018979 HP:0012377 human_phenotype