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Related Experiment Videos

Could visual neglect induce amblyopia?

J C Bier1, M Vokaer, P Fery

  • 1Department of Neurology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium. Jean-Christophe.Bier@ulb.ac.be

Acta Neurologica Belgica
|March 4, 2005
PubMed
Summary
This summary is machine-generated.

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Absence of diplopia in oculomotor nerve disease with strabismus may indicate visual neglect. This case suggests visual neglect can functionally cause monocular blindness, mimicking other conditions.

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Oculomotor nerve disease frequently causes diplopia (double vision).
  • Absence of diplopia in the presence of strabismus necessitates investigation for conditions like visual field defects, suppression, amblyopia, or blindness.
  • Supratentorial lesions can present complex visual disturbances.

Observation:

  • A 41-year-old woman with right oculomotor paresis and left object-centered visual neglect following a right middle cerebral artery aneurysm rupture.
  • Despite binocular vision and recovering strabismus, the patient reported no diplopia.
  • The bell cancellation test worsened with left eye patching, indicating attentional visual neglect.

Findings:

  • The patient's lack of diplopia, despite oculomotor paresis and strabismus, was hypothesized to be due to object-centered visual neglect.

Related Experiment Videos

  • The neglect of the left visual field, corresponding to the deviated image from right oculomotor paresis, was functionally equivalent to right monocular blindness.
  • This case supports the concept of functional monocular blindness induced by visual neglect.

    • Implications:

    • The findings suggest that visual neglect can mask or mimic other causes of absent diplopia in patients with strabismus.
    • Clinicians should consider screening for hemispatial visual neglect in cases of unexplained absence of diplopia with strabismus, particularly with suspected supratentorial lesions.
    • This highlights the intricate relationship between attention, visual perception, and oculomotor function.