Abstract
Non-arteritic anterior ischaemic optic neuropathy (NAION) is typically a disorder of older patients who have predisposing risk factors. It is the most common acute optic neuropathy in patients over the age of 50. 1,2 Occasionally, NAION occurs in younger patients in the absence of conventional vascular risk factors such as hypertension, hyperlipidaemia, tobacco use, and diabetes. An elevated level of plasma homocysteine is associated with an increased risk of cerebrovascular, cardiovascular, or peripheral vascular disease before 50 years of age.3-5 The risk of NAION due to hyperhomocysteinemia is independent of other risk factors like diabetes and hypertension. We hereby report a case of a young individual who developed NAION due to hyperhomocysteinemia in the absence of other risk factors.
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