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Related Experiment Videos

Optic nerve size in traumatic optic neuropathy.

B G Robillard1, B S Sires, E F Pinczower

  • 1Washington University School of Medicine, Department of Otolaryngology, St. Louis, Missouri, USA.

The Journal of Cranio-Maxillofacial Trauma
|April 16, 2002
PubMed
Summary

Optic nerve size is not a reliable indicator for diagnosing traumatic optic neuropathy. This study found no significant size difference between injured and non-injured optic nerves in patients with traumatic optic neuropathy.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Radiology

Background:

  • Assessing traumatic optic neuropathy (TON) in neurologically impaired patients presents diagnostic challenges.
  • Optic nerve size has been proposed as a potential aid in differential diagnosis for TON.

Purpose of the Study:

  • To evaluate and compare the size of the optic nerve in the injured eye versus the non-injured eye in patients with traumatic optic neuropathy.

Main Methods:

  • A controlled retrospective study involving 22 patients.
  • Maxillofacial computerized tomographs (CT) were analyzed.
  • Intraorbital optic nerve diameter was measured on both injured and uninjured sides by an independent examiner.

Main Results:

  • No statistically significant difference was observed in the size of the optic nerve between the traumatized side and the intact side.
  • The measurements were performed using computerized tomograph scans.

Conclusions:

  • Optic nerve size, as measured by CT scans, is not a reliable predictor for the presence or absence of traumatic optic neuropathy.
  • This finding suggests that optic nerve diameter measurements alone are insufficient for diagnosing TON.

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