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Ch.6 Vision. 1  Describe the characteristics of light and color, outline the anatomy of the eye and its connections with the brain, and describe the process of transduction of visual information. 2  Describe the coding of visual information by photoreceptors and ganglion cells in the retina. The photoreceptors form synapses with bipolar cells, neurons whose two arms connect the shallowest and deepest layers of the retina. 2  In turn, these neurons form synapses with the ganglion cells, neurons whose axons travel through the optic nerves (the second cranial nerves) and carry visual information into the brain.
The retina is composed of light-sensitive neurons arranged in three layers; the first layer is made up of rods and cones and the other two transmit impulses from the rods and cones to the optic nerve.The rods are sensitive in dim light, and the cones are sensitive in bright light and are responsible for color vision.ETINA: Microscopic structure of optic disk area. The innermost layer of the eye, which receives images transmitted through the lens and contains the receptors for vision, the rods and cones.