This is a simplified picture of the retina showing the
outer retina containing
rods and
cones above and the
inner retina with the ganglion cells below.
Some of those
retinal ganglion cells (RGCs) contain a photopigment and are photosensitive. They are thus called ipRGCs: intrinsically photoreceptive retinal ganglion cells.
FolkeNoertemann - 17 May 2011
SimpleDrawingOfRetina