Retinal Ganglion
  LGN - M: LRF, LC & TF
  LGN -  P: SRF, CC & SF
   Sup Coll-eye mov/sacc
   Pre Tect-light reflex
   SCN-melanopsin (circ rhythm)
Interneurons
  Amacrine
  Bipolar
  Horizontal
Photoreceptors
  Rods & Cones