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Monocular central dazzle after thalamic infarcts.

R A Du Pasquier1, D Genoud, A B Safran

  • 1Department of Neurology, Geneva University Hospitals, Switzerland.

Journal of Neuro-Ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society
|June 28, 2000
PubMed
Summary

A patient experiencing ischemic strokes developed central dazzle, a visual disturbance. This case is the first documented instance of monocular dazzle originating from a thalamic lesion.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Ischemic strokes can affect various brain regions, leading to diverse neurological deficits.
  • The thalamus plays a crucial role in sensory processing and relay.

Observation:

  • A patient presented with symptoms following bilateral paramedian thalamic ischemic strokes.
  • The patient exhibited dysphasia, vertical binocular diplopia, right hemianopia, and right-sided sensory-motor deficits.

Findings:

  • The most prominent symptom was a painless, left monocular dazzle, which was both the initial and persistent complaint.
  • This case suggests that thalamic lesions can cause central dazzle.
  • This is the first reported clinical observation of monocular central dazzle.

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Implications:

  • Thalamic lesions are a potential cause of central dazzle.
  • The phenomenon may involve optic-trigeminal summation.
  • This finding expands the understanding of visual disturbances following thalamic stroke.