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. 2019 May 17;19:115. doi: 10.1186/s12886-019-1125-y

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© The Author(s). 2019

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. 5 — The contrast of the images at the center and periphery 80° obtained with Optos® 200Tx and California. The contrast of the images obtained with Optos® California is significantly better at the center (0.12 vs 0.09), superior (0.07 vs 0.03) and right (0.12 vs 0.07) direction