Fig. 1

Dark adaptation curve from a 25-year-old female participant with a choroidal thickness of 310 μm. At time 0 the retina was partially bleached with a white photoflash (0.25 ms duration, 6.38 log scotopic Trolands-second). The dark adaptation curve does not exhibit the initial exponential part of the cone adaptation as the cone adaptation was fast and the retina not fully bleached. The recovery time to reach the pre-specified sensitivity threshold of 3 log units was 6.9 min. The rod adaptation rate was 0.37 log units/min as estimated from the slope of the second part of the curve, which represents the rod-mediated dark adaptation