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Related Experiment Videos

Visual evoked potentials and visual prognosis following perinatal asphyxia.

D L McCulloch1, M J Taylor, H E Whyte

  • 1Department of Ophthalmology, Hospital for Sick Children, Toronto, Canada.

Archives of Ophthalmology (Chicago, Ill. : 1960)
|February 1, 1991
PubMed
Summary

Early postnatal visual evoked potentials strongly predict long-term vision in children with perinatal asphyxia. Abnormal or absent early results indicate a high risk of visual impairment or blindness.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Pediatrics

Background:

  • Perinatal asphyxia is a significant risk factor for adverse neurodevelopmental outcomes in term infants.
  • Visual impairment is a potential complication following perinatal asphyxia, impacting long-term development.
  • Early identification of visual prognosis is crucial for timely intervention.

Purpose of the Study:

  • To evaluate visual function in children with a history of perinatal asphyxia.
  • To determine the prognostic value of early postnatal visual assessments for long-term visual outcomes.
  • To identify predictors of visual impairment in this population.

Main Methods:

  • Longitudinal study of 25 term infants with perinatal asphyxia, assessed between 2.5 and 4.5 years.

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  • Early postnatal assessments (first week) included electroretinograms and visual evoked potentials.
  • Follow-up included clinical eye exams, flash and pattern visual evoked potentials, and threshold measurements.

    • Main Results:

    • Nineteen children had normal visual function; three were visually impaired, and three were blind.
    • Early postnatal visual evoked potentials showed a strong association with long-term visual outcome (P < .0001).
    • Neurologic status, Apgar scores, and arterial pH were poor predictors of visual outcome.

    Conclusions:

    • Early postnatal visual evoked potentials are reliable predictors of long-term visual function in children with perinatal asphyxia.
    • Visual impairment risk is concentrated in survivors with neurodevelopmental deficits.
    • Routine early visual assessments can aid in predicting and managing visual outcomes.