OCT Angiography Quantification of the Capillary Peripapillary Plexus in Non-Arteritic Anterior Ischemic Neuropathy

OCT angiography is an imaging method allowing the visualization of the retinal peripapillary and optic nerve head (ONH) vessels. With specific algorithms it is also possible to quantify the vascular density and the flux index of these areas. Quantification Is based on an automatic segmentation which includes both RNFL and GCL layers, each of them being vascularized by two different plexus. At the acute phase of non-arteritic anterior ischemic optic neuropathies (NAION) previous studies have shown controversial results concerning the peripapillary blood flow and vessel density. The aim of our study is to perform a vascular quantification of the top-most retinal layer including exclusively the RNFL using a new algorithm.