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Related Experiment Videos

Optic hydrops: isolated nerve sheath dilation demonstrated by CT.

J R Jinkins1

  • 1Department of Radiology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.

AJNR. American Journal of Neuroradiology
|September 1, 1987
PubMed
Summary

The optic subarachnoid space can selectively dilate in certain diseases affecting the orbit and surrounding areas. This optic hydrops concept explains isolated papilledema without increased intracranial pressure due to focal disease.

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Area of Science:

  • Neuro-ophthalmology
  • Radiology
  • Neurosurgery

Background:

  • The optic subarachnoid space (OSS) plays a role in optic nerve health.
  • Understanding OSS dynamics is crucial for diagnosing orbital and cranial pathologies.

Purpose of the Study:

  • To illustrate the selective dilation potential of the OSS.
  • To explore the concept of optic hydrops in relation to focal diseases.

Main Methods:

  • Review of imaging studies demonstrating OSS changes.
  • Correlation of clinical findings with radiological evidence.

Main Results:

  • The OSS can selectively dilate in response to diseases of the orbit, optic canal, and sellar/parasellar regions.
  • Focal disease in these areas can lead to isolated papilledema, consistent with optic hydrops.

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Conclusions:

  • Optic hydrops provides a framework for understanding papilledema secondary to localized pathology.
  • Selective OSS dilation is a key imaging finding in these conditions.