eli5, how is it that cameras can see clearly underwater whereas human vision gets blurry?
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Our eyes are designed to see in air, based on millions of years of evolution. When we are underwater, the light bends differently when it enters the eye than it does on land, and so it will be blurry when it hits the retina at the back of the eye.
Camera lenses can be designed to work underwater, so they can see clearly in water
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