Fig. 3.

(a-b) Stimulus protocol 1 for functional experiments in human subjects. An OCT raster scan of 128 images × 168 axial scans, shown in red, is repeated, generating 2 volumes / second. For each trial, one side of the field is randomly selected for illumination, corresponding to one of the two cases shown in (a-b). (c) Analysis of the functional experiment. The analysis procedure for each region is the same whether or not it was illuminated for a particular trial. For each frame within a trial, correlation is performed to determine portions of region 1 and region 2 that overlap with the baseline frame. Only the areas shaded in gray are used to determine the fractional changes in normalized reflectance described by Eq. (1)-(4). (d-f) Stimulus protocol 2 and analysis used for functional experiments. For this protocol, an OCT raster scan of 64 images × 112 axial scans, shown in red, is repeated, generating 6 volumes / second.