Fig. 1. Schematic layout of the binocular modification to the Tracking Scanning Laser Ophthalmoscope (modified from Sheehy et al., 2012). Mirror FM3 is placed at a retinal
conjugate point, splitting the field into left eye and right eye halves. Each half of the scan is reflected by a concave mirror and a flat mirror into the respective eyes. The
resulting scan produces a split field image with left and right retinal images side by side in the each frame. The horizontal scanner is a polished bar resonating at 15.4 kHz and
images are collected during a 26 ls time window during one direction of scan, so left and right eye samples are collected about 13 ls apart. Eyes are not shown to scale.