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. 2019 Nov 8;21(11):e14808. doi: 10.2196/14808

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©Robert P L Wisse, Marc B Muijzer, Francesco Cassano, Daniel A Godefrooij, Yves F D M Prevoo, Nienke Soeters. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 08.11.2019.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Refractive error measured using the online test was plotted against refractive error measured using manifest refraction; each symbol represents an individual eye measured in a participant who was tested using the first-generation algorithm (red squares) or the second-generation algorithm (blue circles). The 45° dashed line represents an ideal fit. Outliers are identified particularly in the high-myopia group (bottom-left), and these differences are reduced in the second generation cohort. SEQ: spherical equivalent.