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. 2023 Mar 23;26(4):606–614. doi: 10.1038/s41593-023-01280-0

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© The Author(s) 2023

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Extended Data Fig. 2 — We used natural images of animals and landscapes of the African savanna from van Hateren repository, used in⁵¹ (a) Top - RFs optimized at different levels of SNR. Bottom – center size (purple line) and relative surround strength (black line) plotted as a function of the SNR. (b) Top - RFs optimized at different levels of the vertical SNR asymmetry. Bottom – vertical surround asymmetry plotted as a function of the vertical SNR asymmetry of the model photoreceptor output (RGC input). (c) RFs predicted for different positions within the visual field. (d) Horizontal cross-sections of model RFs in (c).