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. 2019 Sep 11;5:34. doi: 10.1186/s40942-019-0184-9

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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. 2 — Illustration of the image processing using ImageJ to quantify silicone oil droplets. a (Top left): ultrasound image showing an eye previously treated the multiple injections presenting many hyperechoic areas. b (Top right): after binarization, a yellow line demarcates the vitreous borders. The presumed oil droplets are in black. c (Bottom left): ultrasound image of the contralateral, healthy eye of the same subject. d (Bottom right): after binarization of the control eye, only a few black dots can be seen within the demarcated vitreous area (yellow)