Google Glass has attracted all kinds of attention, much of it negative: while the idea of a head-mounted computer sounds suitably sci-fi, the high cost and associated controversy - privacy fears, early adopters being mugged, some places banning Glass altogether - means it hasn’t become the massive success that Google probably hoped it would be. But in the right hands - or rather, on the right heads - it could revolutionise the way people work. It’s particularly exciting for medicine.

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