Peripapillary Vascular changes in nonarteritic anterior Isch
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Nonarteritic anterior ischemic optic neuropathy (NAION) is one of the most common and visually crippling diseases in middle-aged and elderly. It is presumed to result from a vascular insufficiency in the optic nerve head, which is supplied by the posterior ciliary artery circulation. Currently, fluorescein angiography (FA) is thought to be the only way to demonstrate the impaired circulation and its location in NAION. However, FA is an invasive procedure and requires contrast injection. On the contrary, newly developed optical coherence tomography angiography (OCTA) using Split-spectrum amplitude-decorrelation angiography can visualize the blood flow and microvascular network by decorrelating the motion of red blood cells from the static tissues, without the need of contrast injection. Herein, we report the peripapillary vascular changes by using OCTA in a case of NAION.

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