Diseases

Hemianopsia

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.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

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.

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MeSH Record

Synonyms

39 entry terms
  • Hemianopia
  • Hemianopias
  • Hemianopsias
  • Altidudinal Hemianopia
  • Altitudinal Hemianopsia
  • Binasal Hemianopia
  • Bitemporal Hemianopia
  • Hemianopsia, Binasal
  • Hemianopsia, Bitemporal
  • Hemianopsia, Homonymous
  • Homonymous Hemianopia
  • Quadrantanopia
  • Quadrantanopsia
  • Altidudinal Hemianopias
  • Altitudinal Hemianopsias
  • Binasal Hemianopias
  • Binasal Hemianopsia
  • Binasal Hemianopsias
  • Bitemporal Hemianopias
  • Bitemporal Hemianopsia
  • Bitemporal Hemianopsias
  • Hemianopia, Altidudinal
  • Hemianopia, Binasal
  • Hemianopia, Bitemporal
  • Hemianopia, Homonymous
  • Hemianopias, Altidudinal
  • Hemianopias, Binasal
  • Hemianopias, Bitemporal
  • Hemianopias, Homonymous
  • Hemianopsia, Altitudinal
  • Hemianopsias, Altitudinal
  • Hemianopsias, Binasal
  • Hemianopsias, Bitemporal
  • Hemianopsias, Homonymous
  • Homonymous Hemianopias
  • Homonymous Hemianopsia
  • Homonymous Hemianopsias
  • Quadrantanopias
  • Quadrantanopsias

MeSH Record

Aspects Covered

35 allowable subheadings

Indexed with the subheadings blood, cerebrospinal fluid, chemically induced, classification, complications, congenital, diagnosis, diagnostic imaging, diet therapy, drug therapy, economics, embryology, enzymology, epidemiology, ethnology, etiology, genetics, history, immunology, metabolism, microbiology, mortality, nursing, parasitology, pathology, physiopathology, prevention & control, psychology, radiotherapy, rehabilitation, surgery, therapy, urine, veterinary, virology.

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References

  1. National Library of Medicine. Hemianopsia. Medical Subject Headings (MeSH). 2026. Unique ID D006423. http://id.nlm.nih.gov/mesh/2026/D006423
  2. Hemianopsia. In: Wikipedia. https://en.wikipedia.org/wiki/Hemianopsia
  3. Hemianopsia. In: Wikidata. https://www.wikidata.org/wiki/Q363342