Medical terminology · Neurology
Hemianopsia
MeSH — National Library of Medicine · Retrieved 2026-10-13
Partial or complete loss of vision in one half of the visual field(s) of one or both eyes. Subtypes include altitudinal hemianopsia, characterized by a visual defect above or below the horizontal meridian of the visual field. Homonymous hemianopsia refers to a visual defect that affects both eyes equally, and occurs either to the left or right of the midline of the visual field. Binasal hemianopsia consists of loss of vision in the nasal hemifiel
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Reference details
- MeSH descriptor
- D006423
- Vocabulary edition
- 2026
- Tree positions
- C10.597.751.941.512; C11.966.075.500; C23.888.592.763.941.512
Scope and definition
Partial or complete loss of vision in one half of the visual field(s) of one or both eyes. Subtypes include altitudinal hemianopsia, characterized by a visual defect above or below the horizontal meridian of the visual field. Homonymous hemianopsia refers to a visual defect that affects both eyes equally, and occurs either to the left or right of the midline of the visual field. Binasal hemianopsia consists of loss of vision in the nasal hemifields of both eyes. Bitemporal hemianopsia is the bilateral loss of vision in the temporal fields. Quadrantanopsia refers to loss of vision in one quarter of the visual field in one or both eyes.
Entry terms and synonyms
Hemianopsia
Hemianopsias
Hemianopia
Hemianopias
Hemianopsia, Homonymous
Hemianopsias, Homonymous
Homonymous Hemianopsia
Homonymous Hemianopsias
Homonymous Hemianopia
Hemianopia, Homonymous
Hemianopias, Homonymous
Homonymous Hemianopias
Quadrantanopsia
Quadrantanopsias
Quadrantanopia
Quadrantanopias
Altidudinal Hemianopia
Altidudinal Hemianopias
Hemianopia, Altidudinal
Hemianopias, Altidudinal
Altitudinal Hemianopsia
Altitudinal Hemianopsias
Hemianopsia, Altitudinal
Hemianopsias, Altitudinal
Binasal Hemianopia
Binasal Hemianopias
Hemianopia, Binasal
Hemianopias, Binasal
Hemianopsia, Binasal
Binasal Hemianopsia
Binasal Hemianopsias
Hemianopsias, Binasal
Bitemporal Hemianopia
Bitemporal Hemianopias
Hemianopia, Bitemporal
Hemianopias, Bitemporal
Hemianopsia, Bitemporal
Bitemporal Hemianopsia
Bitemporal Hemianopsias
Hemianopsias, Bitemporal
Classification tree positions
C10.597.751.941.512
C11.966.075.500
C23.888.592.763.941.512
Sources and reuse
Medical vocabulary definition and classification record.
Retrieved: 2026-10-13. Text has been organized for reading; this import has not been independently reviewed by a clinician. It is not individualized medical advice.
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