Those Maddening Eyeball Floaters!

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You’ve probably seen them before. Mysterious shapes floating just in your field of vision. What do they mean? SciShow breaks it down.

Claude Monet’s Ultraviolet Eye

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What happens when one of the greatest artists in history gets cataracts and removes one of his lenses? A messy, colorful vision unlike anything we’re used to. It’s Okay To Be Smart gives us a glimpse.