Retinal vision A. Discuss the molecular mechanisms on how a photoreceptor relays a signal to the bipolar cells B. Explain receptive fields in the retina and how they are relayed to the brain. C. What is dark and light adaptation? Central vision A. Describe the circuitry that allows us to have binocular vision. Make sure you include the proper neuronal layer in the striate cortex. B. Explain the organization of ocular dominance columns and how scientists learned about them. C. Explain the differences among the parvocellular, magnocellular, and koniocellular pathways.