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. 2014 Dec 10;5:1431. doi: 10.3389/fpsyg.2014.01431

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Copyright © 2014 Serrano-Pedraza, Romero-Ferreiro, Read, Diéguez-Risco, Bagney, Caballero-González, Rodríguez-Torresano and Rodriguez-Jimenez.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Log ratios of contrast detection thresholds as a function of age (years). (A) panel shows the log ratios between the contrast detection threshold in the condition Parallel Surround and the condition No-Surround. (B) panel shows the log ratios between the contrast detection threshold in the condition Orthogonal Surround and the condition No-Surround. Blue squares, ratios for patients; red circles, ratios for control group. The blue horizontal line represents the mean ± SEM for patients; the red horizontal line represents the mean ± SEM for the control group. p-values were obtained using two-tailed t-test. Asterisks (*) correspond to significant differences between the means of the log ratios.