Overall RS-SDOCT system schematic. Configurations of sampling optics used for collection from retina (config A), and from standard samples (config B). PC – polarization control paddles, ND – neutral density filter, WC – water-filled cuvette, TM – translatable mirror, LP – long pass filter, DM – dichroic mirror, BP – band pass filter, SF – spatial filter, xy – xy galvanometer pair, MOS – MEMS optical switch, and NI-DAQ – National Instruments multifunction DAQ.