Fig. 5 Neuronal connections in the retina: (1) inner plexiform layer, (2) inner nuclear layer, (3) outer plexiform layer, (4) outer nuclear layer, (5) external limiting membrane, (6) photoreceptor inner and outer segments, (7) pigment epithelium. G, ganglion cells. (Wolff E: The Anatomy of the Eye and Orbit, 4th ed. New York: Blakiston, 1954)