Fig. 1. Histologic cross section (A) and schematic diagram (B) of the retina. (ILM, inner limiting membrane; NFL, nerve fiber layer; GCL, ganglion cell layer; IPL, interplexiform layer; INL, inner nuclear layer; OPL, outer plexiform layer; ONL, outer nuclear layer; OLM, outer limiting membrane; POS, photoreceptor outer segments; RPE, retinal pigment epithelium; BM, Bruch's membrane; a, amacrine cell; b, bipolar cell; c, cone; g, ganglion cell; h, horizontal cell; i, interplexiform cell; m, Müller cell; r, rod; Cap, a retinal capillary). (Fliesler SJ, Anderson RE: Chemistry and metabolism of lipids in the vertebrate retina. In Holman RT [ed]. Progress in Lipid Research. Vol 22. Elmsford, New York: Pergamon Press, 1983:81)