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The discussion of the anatomy and evolution of eyes. Consider using the "vision" tag for questions regarding how the brain interprets information from the eyes.

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Do octopuses have better eyes than humans?

There are a couple of advantages and disadvantages of possessing the eyes of octopuses. The first advantage of the octopus eye is that it has no blind spot. … The eyes possess no cones, only the invertebrate equivalent of rods. This means that octopuses can only distinguish between light and dark. …
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