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. 2018 Feb 7;18:33. doi: 10.1186/s12886-018-0700-y

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© The Author(s). 2018

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. 3 — The representative pictures showing the improvements in lipid layer thickness after WMCGs wear. The lipid structure was very thin with pretty grey color and hardly visible at baseline (a1, b1). The LLT became much thicker with brown-blue interference patterns after 5 min of finishing WMCGs wear (a2), and the effect kept similar after 30 min (a3), and decreased but still thicker than the baseline level after 60 min (a4). However the effect in the control group was nearly unnoticeable accross 60 min (b2, b3, and b4)