Fig. 1. Radial section of the primate retina near the fovea. Note predominance of cones, with only a few rods. RPE = retinal pigment epithelium; OS = outer segments (of photoreceptor); IS = inner segments; ONL = outer nuclear layer; OPL = outer plexiform layer; INL = inner nuclear layer; IPL = inner plexiform layer; GC = ganglion cell layer; NFL = nerve fiber layer; ILM = inner limiting membrane.