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Fun octopus fact: Octopus eyes are so advanced that camera manufacturers have used their eyes as a model to improve the camera lens. Until recently, because of the curve of a camera's lens, the picture often blurred at the edges. To correct this, nicer camera models often contained up to eight lenses, which was both bulky and expensive. Yet by copying the structure of an octopus eye, which has several thin layers ­of multiple densities to bend and focus light, camera manufacturers were a...