Figure 2

B-scans of the outer retina before (“off”, measurement index 12) and after (“on”, measurement index 19) light stimulation registered and flattened to the IS/OS junction and averaged along the fast axis. Schematic interpretation of the cells’ involvement in the path length decrease between IS/OS junction and RPE after light stimulation is presented as an overlay. In the baseline measurement (“off”), the reflectors of ROST and RPE are clearly separated, while after light stimulation (“on”) their peaks have merged. These findings show that the outer segment tips and RPE are drawn closer together after light exposure. This is associated with a decrease in volume of the subretinal space, as indicated by the red arrows.