photoreceptor cells
"The retina is the layer of photoreceptor cells that make up the very back of the eye. In many ways, the retina works like a digital camera*. The photoreceptor cells are like individual pixels, and the brain puts all these pixels together to make a single image."
"How a retinal prosthesis works. Photoreceptor cells are like tiny cameras in the retina that convert light to electrical signals and send them to the brain. These cells are killed by diseases like macular degeneration and retinitis pigmentosa, causing loss of vision."
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