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Related Experiment Videos

Bilateral altitudinal visual fields.

A Lakhanpal1, J B Selhorst

  • 1St. Louis University School of Medicine, Department of Neurology, MO 63110.

Annals of Ophthalmology
|March 1, 1990
PubMed
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Two patients experienced sudden, complete binocular inferior altitudinal visual-field defects (AVFDs). Bilateral occipital infarcts were confirmed as the cause, presenting unique diagnostic considerations for AVFDs.

Area of Science:

  • Ophthalmology
  • Neurology
  • Neuroscience

Background:

  • Altitudinal visual-field defects (AVFDs) typically result from vascular occlusions or trauma affecting the optic nerves or visual cortex.
  • Bilateral AVFDs are less common and often present with unilateral symptoms initially.
  • Understanding the visual system's topographic organization is crucial for diagnosing AVFDs.

Observation:

  • Two patients presented with absolute, complete, binocular inferior altitudinal hemianopias.
  • These defects respected the horizontal meridian, affecting both nasal and temporal quadrants.
  • No retinal, retinovascular, or optic nerve abnormalities were observed.

Findings:

  • The patients' condition was diagnosed as bilateral occipital infarcts.

Related Experiment Videos

  • Sudden, simultaneous onset of AVFDs characterized these cases.
  • Computed tomographic scanning confirmed the occipital infarcts.

    • Implications:

    • Bilateral occipital infarcts can cause simultaneous, complete altitudinal visual-field defects.
    • Diagnosis relies on clinical presentation and neuroimaging, as funduscopic examination is normal.
    • This presentation highlights the importance of considering occipital lobe pathology in bilateral AVFDs.