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. 2021 Jan 30;10(1):175–185. doi: 10.1007/s40123-021-00331-8

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, which permits any non-commercial 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-nc/4.0/.

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Fig. 1 — Three-month and 12-month outcomes of wavefront-optimized PRK retreatment. I Cumulative Snellen VA (20/× or better) with plano target. II Differences between UDVA and CDVA (Snellen lines) with plano target. III Change in snellen lines CDVA. IV Spherical equivalent refraction attempted vs achieved. V Spherical equivalent refraction accuracy. VI Spherical equivalent refraction. VII Pre- and postop refractive astigmatism. VIII Target induced astigmatism vs surgically induced astigmatism. IX Refractive astigmatism angle of error