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. 2024 Oct 7;7:275. doi: 10.1038/s41746-024-01271-w

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, 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 you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. 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-nc-nd/4.0/.

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Fig. 6 — a An optic disc-centered circular region with a radius of 3 DD away from the optic disc was cropped from the UWF image to represent the central 50° fundus region (denoted as CTR). b B-zone (an annular region that is 0.5–1 DD outside the optic disc) and C-zone (an annular region that is 0.5–3.5 DD outside the optic disc) are used for calculating the AVR for CTR and UFW image (denoted as B-AVR and C-AVR, respectively). c The Df and TORT of both CTR and UWF images were also calculated and compared.