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The nature of light is not what causes vision. Vision is due to the reaction of organic chemicals and special cells in the eye to particular wavelenghts.

One could imagine creatures that see slighlty better than humans in the near IR and the near UV, but basic physics makes imaging in the farther IR not very sharp, and the farther wavelengths of UV are very hard for living tissues to focus, and they cause fluorescence. UV also damages DNA and other cellular material. What we are stuck with seems to be what most life forms use for vision.

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17y ago

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