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. 2021 Apr 15;12(4):437–452. doi: 10.4239/wjd.v12.i4.437

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©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/

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Outer blood-retina barrier. M: Müller cells; A: Amacrine cells; G: Ganglion cells; BV: Blood vessels; As: Astrocyte; B: Bipolar cells; R: Rods; C: Cones; H: Horizontal cells; Mi: Microglia; ON: Optic nerve; NFL: Nerve fibre layer; GCL: Ganglion cell layer; IPL: Inner plexiform layer; INL: Inner nuclear layer; OPL: Outer plexiform layer; ONL: Outer nuclear layer; ELM: External limiting membrane; IS: Inner segment photoreceptors; OS: Outer segment photoreceptors; RPE: Retinal pigment epithelium; BM: Bruch’s Membrane; Ch: Choroid.