From the “Why Didn’t I Think Of That?” department comes news that a British professor has invented a pair of glasses with adjustable lenses so that the wearer can fine-tune his or her own prescription without the need for an expensive specialist. Inside the glasses’ tough plastic lenses are two clear circular sacs filled with fluid which can be increased or decreased with a tiny syringe attached to either arm of the spectacles. When the wearer is satisfied with the thickness of the lenses the sacs are sealed with a small screw. Brilliant! The professor has already distributed 30,000 pairs to the poorest people in 15 countries and has set a goal to offer glasses to a billion people by the year 2020. (The Guardian)

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