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Compressive Optic Neuropathy and Repeat Orbital Decompression: A Case Series.

Courtney Y Kauh1, Shivani Gupta, Raymond S Douglas

  • 1Department of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, Michigan, U.S.A.

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|December 24, 2014
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Summary
This summary is machine-generated.

Repeat orbital decompression significantly improved vision in thyroid eye disease patients with recurrent compressive optic neuropathy (CON). This highlights the progressive nature of CON and the need for ongoing monitoring even with low clinical activity scores.

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Area of Science:

  • Ophthalmology
  • Endocrinology
  • Neurosurgery

Background:

  • Thyroid eye disease (TED) can cause compressive optic neuropathy (CON), potentially requiring surgical intervention.
  • Recurrent or recalcitrant CON may necessitate repeat orbital decompression surgery.
  • Assessing outcomes of repeat decompression is crucial for managing TED-related visual impairment.

Observation:

  • This study retrospectively reviewed six patients (nine orbits) with recurrent/recalcitrant CON undergoing repeat orbital decompression.
  • Patients presented with a mean preoperative Clinical Activity Score (CAS) of 3.8, with a mean of 8.6 years since initial decompression.
  • Preoperative visual field mean deviation averaged -16.5, improving to -3.8 postoperatively.

Findings:

  • Repeat orbital decompression led to statistically significant improvements in visual acuity, visual fields, and color vision (p < 0.05).
  • All patients experienced visual improvement, with visual acuity improving from 0.34 to 0.05 LogMAR and visual fields improving by 75%.
  • Improvements were noted even in patients with a low mean CAS, emphasizing the importance of monitoring visual function.

Implications:

  • Recurrent CON can manifest years after initial surgery, indicating a smoldering, progressive disease course in TED.
  • Repeat orbital decompression, particularly targeting the orbital apex, is effective in restoring vision in recalcitrant CON.
  • Close patient monitoring post-decompression is vital, irrespective of external disease activity, to detect and manage recurrent CON promptly.