Photomicrographs of rat retinas with H-E staining: (a) Normal
group: retinal cells displayed normal shapes and orderly arrangements in every layer.
of the retinal tissues; (b) Normal +Cs-A group: no obvious abnormalities were.
observed compared to the normal group; (c) DM group: there were edema and.
thickening of ganglion cell layer, inner plexiform layer and outer nuclear layer, besides disordered alignments of inner nuclear layer; (d) DM + Cs-A group: there were approximately regular arrangements of retinal cells and slightly thickened retina tissues. Original magnification was 400X.