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Optic Neuropathy in Patients Using Amiodarone
Valerie Purvin, MD;
Aki Kawasaki, MD;
Francois-Xavier Borruat, MD
Arch Ophthalmol. 2006;124:696-701.
Objective To refine the criteria for the diagnosis of amiodarone-related optic neuropathy by including a broader spectrum of clinical features, thus helping to differentiate this entity from nonarteritic anterior ischemic optic neuropathy coincidentally affecting a patient taking amiodarone.
Methods A retrospective case review of 22 patients who developed optic neuropathy while taking amiodarone, in whom other systemic causes were excluded.
Results We identified 3 groups of patients: those in whom a diagnosis of amiodarone-induced optic neuropathy seems probable (n = 14), those in whom an association with amiodarone optic neuropathy is indeterminate (n = 5), and those in whom the occurrence of nonarteritic anterior ischemic optic neuropathy seems to be coincidental (ie, unrelated to amiodarone) (n = 3). We formulated specific diagnostic criteria for each of these categories.
Conclusions We recommend a systematic approach that includes assessment of bilaterality, mode of onset, degree of optic nerve dysfunction, structure of the uninvolved optic disc in unilateral cases, and systemic toxic effects. Such well-defined diagnostic criteria can help the clinician in the treatment of patients with this disorder.
Author Affiliations: Midwest Eye Institute and Departments of Ophthalmology and Neurology, Indiana University School of Medicine, Indianapolis, Ind (Dr Purvin); and Department of Neuro-ophthalmology, Hopital Ophtalmique Jules Gonin, Lausanne, Switzerland (Drs Kawasaki and Borruat).
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