Nonarteritic anterior ischemic optic neuropathy associated w
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There are well-recognised risk factors for nonarteritic anterior ischemic optic neuropathy (NAION), which include cardiovascular comorbidities such as diabetes and hypertension, as well as hypermetropia or a small crowded optic disc. There have been previous case reports suggesting that antiviral therapy, such as those used in the treatment of chronic hepatitis C, can cause a form of NAION. At the onset of visual symptoms, the patients in these cases were either on established interferon antiviral treatment or had recently completed therapy. We report a case of probable pegylated interferon ? and ribavirin-associated NAION, its clinical course on steroid therapy and review the evidence for interferon associated NAION in hepatitis C patients.

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