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Apical optic nerve compression of dysthyroid optic neuropathy on computed tomography
Archives of Ophthalmology (Chicago, Ill. : 1960)
|May 1, 1981
Summary
Computed tomography scans reveal significant extraocular muscle thickening at the orbital apex in dysthyroid optic neuropathy cases. This thickening likely causes optic nerve compression, impacting vision and requiring targeted treatment.
Area of Science:
- Ophthalmology
- Radiology
- Endocrinology
Background:
- Dysthyroid optic neuropathy is a vision-threatening complication of Graves' disease.
- Orbital apex muscle thickening is implicated in optic nerve compression.
Purpose of the Study:
- To investigate the CT findings in dysthyroid optic neuropathy.
- To correlate imaging findings with clinical presentation and management.
Main Methods:
- Computed assisted tomography (CT) was performed on seven dysthyroid optic neuropathy patients and two controls.
- Muscle thickness at the orbital apex was assessed.
Main Results:
- Moderate to severe extraocular muscle thickening at the orbital apex was observed in dysthyroid optic neuropathy cases.
- Control cases without neuropathy showed minimal or fusiform thickening.
Conclusions:
- Apical compression of the optic nerve or its vasculature is a probable cause of neuropathy.
- Management options include corticosteroids, radiation therapy, or surgical decompression focused on the orbital apex.