C57Bl/6 retinal scans and posterior segmental layer thickness analysis. En-face view of posterior segment with centralized optic nerve head (a). B-scan image of mouse retina from cross-sectional scan of en-face image (b). B-scan image with defined regions and thickness of posterior segment layers (c). CC: choriocapillaris, ORL: outer retinal layer, IRL: inner retinal layer, RPE: retinal pigment epithelium, ELM/IS/OS: external limiting membrane/inner segment of photoreceptors/outer segment of photoreceptors, ONL: outer nuclear layer, OPL: outer plexiform layer, INL: inner nuclear layer, IPL/GC: inner plexiform layer /ganglion cell, RNFL: retinal nerve fiber layer.