Within each region, measurement mean is the mean of the n=6 right eye measurements for each animal and is grey scale mapped in micrometers. Physiologic inter-eye difference (PID) Maximum is the upper range of the PID within each region for the n=6 PID values (from the n=6 animals) and is grey scale mapped in micrometers. Physiologic inter-eye percent difference (PIPD) Maximum is the upper range of the PIPD within each region (expressed as percent (%) ) for the n=6 PIPD values (from the n=6 animals) and is nested next to the PID value inside the bracket. All data are plotted in right eye configuration. S, superior; SN, superonasal; N, nasal; IN, inferonasal; I, inferior; IT, inferotemporal; T, temporal; ST, superotemporal.