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eyeglasses
If your breath fogs up your lenses while wearing a mask for coronavirus, follow these simple steps to prevent the problem.
Simply giving nearsighted children glasses can dramatically boost their school performance. Convincing teachers and parents is harder.
Think eyeglasses are just a human thing? Think again. As part of ongoing research into the origins of three-dimensional vision, praying mantises are being fitted with tiny 3D glasses.
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