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. 2017 May 12;17:64. doi: 10.1186/s12886-017-0459-6

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© The Author(s). 2017

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. 2 — Typical fundus images of patients included in the study on postoperative Day 1. Group A (left): the air bubble remained at the top one-third of the vitreous cavity, with transparency of the visual axis. Group B (right): the air bubble remained at the top three-fifths of the vitreous cavity, without transparency of the visual axis