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Related Experiment Videos

Cortical visual impairment following birth asphyxia.

E H Roland1, J E Jan, A Hill

  • 1Department of Pediatrics, University of British Columbia, Vancouver, Canada.

Pediatric Neurology
|May 1, 1986
PubMed
Summary

Cortical visual impairment in children with birth asphyxia is often missed. Early diagnosis and investigations like cranial CT and visual evoked potential mapping are crucial for managing this condition.

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Area of Science:

  • Pediatric Neurology
  • Ophthalmology
  • Neuroscience

Background:

  • Visual defects are frequently underdiagnosed in children experiencing neurological issues stemming from perinatal hypoxic-ischemic encephalopathy.
  • Cortical visual impairment (CVI) is a significant concern in this population.

Purpose of the Study:

  • To describe the clinical, radiologic, and electrodiagnostic features of CVI in children following birth asphyxia.
  • To highlight diagnostic challenges and potential outcomes.

Main Methods:

  • Retrospective analysis of 20 children diagnosed with CVI secondary to birth asphyxia.
  • Review of clinical presentations, neuroimaging (cranial computed tomography), and electrophysiological tests (visual evoked potential mapping, electroencephalography).

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Main Results:

  • Clinical diagnosis of CVI was often delayed.
  • Ten patients showed vision recovery within the first two years of life.
  • Four infants presented with concurrent damage to the pregeniculate visual pathway.
  • Cranial CT and visual evoked potential mapping proved useful; electroencephalography showed nonspecific abnormalities.

Conclusions:

  • The findings suggest a need to reconsider the classical definition of cortical blindness in pediatric cases.
  • Early identification and appropriate investigations are vital for managing visual impairment in children with hypoxic-ischemic encephalopathy.