Figure 1  .

Photographs of a section through the fovea of an adult female Macaca mulatta in green light (top panel) and blue light (lower panel). Dark regions in blue light that are absent in green light represent areas of high macular pigment density. PE= retinal pigment epithelium; OS= outer segment layer; IS= inner segment layer; ON= outer nuclear layer; RA= receptor axon layer; IN= inner nuclear layer; IP= inner plexiform layer; GC= ganglion cell layer. (Reprinted from Snodderly et al,¹ with permission from G J Chader, editor in chief, IOVS, and Dr Max Snodderly.)