Non-arteritic anterior ischemic optic neuropathy (NAION) is an ischemic change involves the optic disc. It affects around 10 cases per 100,000 per year in the age group over 50. In 2016 FDA approved a new modality called optical coherence tomography angiography (OCT A) depends on detection of moving RBCs in the vessels to detect the blood vessels. Moreover, this technique differentiates vascular tissue at multiple retinal levels (in depth). We did this work to assess the optical coherence tomography angiography peripapillary area pattern in diagnosed non-arteritic acute ischemic optic neuropathy patients.

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