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. 2018 Dec 27;4:47. doi: 10.1186/s40942-018-0152-9

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — A patient with central retinal vein occlusion. a Fundus photograph, b fluorescein angiography, c optical coherence tomography angiography (OCTA) in superficial capillary plexus, d cystoids macular edema is observed in optical coherence tomography (OCT). e, g Whole vascular density (larger green circle: red arrow), foveal vascular density (small green circle: yellow arrow) and parafoveal vascular density (difference between 2 circles) were calculated in superficial and deep capillary plexuses in OCTA. f, h En face OCT at the level of superficial and deep capillary plexuses showed cystoids macular edema