Functional changes at the retinal center during acute exposure to high altitude in healthy subjects.

<p>A) Intraindividual changes (expressed as differences: baseline-altitude) of best corrected visual acuity (BCVA in logMAR) and B–J) retinal mean sensitivity (MS in dB) values for each ETDRS subfield show no significant changes except in the foveal subfield on day 3 but not on day 1. Red dashed lines indicate BL1 level; center of diamonds represent mean, top and bottom horizontal lines indicate the 95% confidence interval, whiskers indicate standard error and horizontal lines display standard deviation; n = 14.