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Related Experiment Videos

Visual outcome in optic nerve injury patients without initial light perception.

A Agarwal1, A K Mahapatra

  • 1Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.

Indian Journal of Ophthalmology
|July 13, 2000
PubMed
Summary

Visual evoked potential (VEP) recovery predicts vision improvement after head injury blindness. Persistently absent VEPs indicate poor prognosis, while normal VEPs suggest better outcomes.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Neuroscience

Background:

  • Head injuries can cause blindness, impacting patient prognosis.
  • Visual evoked potentials (VEPs) are used to assess visual pathway function.

Purpose of the Study:

  • To evaluate the prognosis of vision recovery in patients with blindness post-head injury.
  • To determine the predictive value of visual evoked potential (VEP) testing.

Main Methods:

  • 100 patients with blindness from head injury underwent visual status assessment, CT/MRI scans, and serial VEPs.
  • Some patients received steroids or surgical decompression.

Main Results:

  • 23 patients showed visual improvement; none returned to normal.

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  • Initial VEPs were absent in 29 patients and abnormal in 71.
  • Repeatedly normal VEPs correlated with visual improvement; persistently absent VEPs did not.

    • Conclusions:

    • VEP recovery (from absent to abnormal, or abnormal to normal) indicates a better visual prognosis.
    • Visual improvement occurred in 23 patients but did not reach normal levels.
    • Injury characteristics, CT findings, and surgery timing did not affect outcomes.