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. 2017 Jun 13;17:89. doi: 10.1186/s12886-017-0484-5

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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. 1 — General diagram of the portable fundus camera prototype. The design is separated into two components: (1) an attachment housing optical components and (2) a liquid crystal display (LCD) monitor with a complementary metal-oxide semiconductor (CMOS) sensor. (3) An eyecup can be fixed with on component 1