Light striking the Artificial Retina causes a chain reaction of chemical and electrical reactions that eventually activate nerve impulses that are delivered to the visual centers of the brain via the optic nerve fibers. Other neurons process neural signals from the rods and cones, and their output takes the form of action potentials in retinal ganglion cells, whose axons comprise the optic nerve. The retinal encoding and processing of light is responsible for several fundamental aspects of visual perception. The retina and optic nerve form as outgrowths of the developing brain, specifically the embryonic diencephalon, in vertebrate embryonic development; consequently, the retina is considered part of the central nervous system (CNS) and is brain tissue. It is the only portion of Non-invasive visualization of the Brain the Blood-retinal barrier protects the retina from the vascular system in the same way that the remainder of the brain is protected by the Blood-brain barrier.
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