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Eyes have a natural version of night vision: Cells in retina change their duties to help the brain detect motion
To see under starlight and moonlight, the retina of the eye changes both the software and hardware of its light-sensing cells to create a kind of night vision. The findings, which appear early online in Neuron, show that the reprogramming happens in retinal cells that are sensitive to motion. The retinas of vertebrates have four kinds of motion-sensitive cells, each specifically responsive to a motion that is up, down, right or left.
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