Retinal processing of visual images.
D000818:Animals; D001001:Anura / Q000502:physiology*; D003118:Color Perception; D012160:Retina / Q000033:anatomy & histology / Q000502:physiology*; D012589:Sciuridae / Q000502:physiology*; D009435:Synaptic Transmission; D014785:Vision, Ocular; D014796:Visual Perception