Physicist Josh Silver's specs may look retro, but they can change lives. Back in July, I wrote about the 2009 TED Global Conference , held at Oxford. The Global Conference is a sort of carnival of ideas, with talks and presentations by by great thinkers of every stripe, from storytellers to designers, anthropologists to physicists, and videos of this years talks have started to trickle onto TED's online archive. Physicists, of course, were well-represented among the ranks of TED speakers, but when Oxford prof Joshua Silver took the stage, the audiences weren't in for the usual science lecture. Silver is an atomic physicist, but lately he's been obsessed with optics; not because he wants to design an invisibility cloak or improve high-speed communication, but because he wants to address a very important problem for the world: bad vision. As Silver points out in his talk , glasses, contact lenses, and even laser eye surgery are facts of life for about half the peopl
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