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Complete binasal hemianopia.

Beau T Bryan1, Howard D Pomeranz1, Kyle H Smith1

  • 1Department of Ophthalmology, Scott & White Eye Institute, Baylor Scott & White, Temple, Texas (Bryan, Smith); and the Department of Ophthalmology, Hofstra North Shore-Long Island Jewish School of Medicine, North Shore Long Island Jewish Health System, Great Neck, New York (Pomeranz).

Proceedings (Baylor University. Medical Center)
|December 9, 2014
PubMed
Summary
This summary is machine-generated.

Complete binasal hemianopia, a rare visual defect, was observed in two asymptomatic patients. These cases are unique as they lack identifiable ocular or neurological causes.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Visual Neuroscience

Background:

  • Binasal hemianopia is an uncommon visual field defect affecting both nasal visual fields.
  • Identifying the etiology of visual field defects is crucial for diagnosis and management.

Observation:

  • Two female patients, aged 17 and 83, presented with asymptomatic, complete binasal hemianopia.
  • Standard ophthalmological examinations revealed only the visual field deficits, with minimally reduced visual acuity and color vision.
  • Neuroimaging studies were unremarkable in both patients.

Findings:

  • These represent the first reported cases of complete binasal hemianopia without a discernible ocular or neurological origin.
  • The findings challenge existing understandings of the causes of binasal visual field loss.

Implications:

  • Suggests potential for novel, yet undiscovered, mechanisms underlying binasal hemianopia.
  • Highlights the importance of considering idiopathic causes in the differential diagnosis of visual field defects.
  • May prompt further research into the neuro-visual pathways and potential subtle pathologies.