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. 2021 Jun 15;10(3):581–599. doi: 10.1007/s40123-021-00357-y

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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. 4 — Percentage change of artificial tear usage (a) and frequency during the study (b)—LCD vs. placebo. The LCD group showed a significant reduction in both the number of subjects and the frequency of using artificial tears from day 15 to 28 and day 29 to 56 compared to the placebo group. *P < 0.05. **P < 0.01