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Dysthyroid optic neuropathy: evaluation and management.

P J Dolman1

  • 1Department of Ophthalmology and Visual Sciences, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada. peterdolman@hotmail.com.

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|July 31, 2020
PubMed
Summary

Dysthyroid optic neuropathy (DON), a complication of Graves orbitopathy, often results from optic nerve compression. Prompt diagnosis and treatment can reverse vision loss in most DON cases.

Keywords:
Compressive optic neuropathyDysthyroid optic neuropathyGraves orbitopathyOrbital decompressionStretch optic neuropathyThyroid eye disease

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Area of Science:

  • Ophthalmology
  • Endocrinology
  • Neurology

Background:

  • Dysthyroid optic neuropathy (DON) is a severe complication of Graves orbitopathy (GO).
  • It arises from optic nerve dysfunction and can lead to irreversible vision loss.

Purpose of the Study:

  • To review current knowledge on DON pathogenesis and epidemiology.
  • To outline clinical and radiologic features.
  • To discuss management strategies and outcomes.

Main Methods:

  • Comprehensive literature review.
  • Analysis of author's retrospective case series.

Main Results:

  • DON typically results from optic nerve compression by enlarged extraocular muscles (EOM) in Graves orbitopathy (GO) patients.
  • Incidence is 5-8% of GO cases; risk factors include age, male gender, smoking, and diabetes.
  • Clinical signs include vision reduction, afferent pupil defect, and optic disc edema; imaging confirms nerve compression.

Conclusions:

  • Timely recognition and management of DON are crucial for vision recovery.
  • While most cases are reversible, permanent vision loss can occur despite treatment.