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. 2021 Dec 1;11:23249. doi: 10.1038/s41598-021-02726-w

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Pattern of retinal edema at baseline in eyes with macular edema secondary to branch retinal vein occlusion (BRVO). All horizontal B-scans across the fovea shows cystoid macular edema. However, the extent and topographic features of retinal edema vary from edema exclusively in the macula (A) and combined extramacular and macular edema (B, C). Depending on the dominant area of edema (white or red areas), eyes with combined edema were separated into macular dominant (B) and extramacular dominant edema (C).