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. 2017 Apr 14;255(8):1465–1482. doi: 10.1007/s00417-017-3659-0

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© The Author(s) 2017

Open Access This 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.

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Fig. 4 — RADNER Reading Charts: Radner Reading Charts, as exemplified by the German version. Four text reading charts, a page with Landolt rings, and a page with numbers are provided in the booklet (original size: big issue, DIN A4 29.7 cm × 21.0 cm; small issue, DIN A5 21 cm × 14.8 xm)