Josh Silver has a brilliant plan, "to offer glasses to a billion of the world's poorest people by 2020". That's real 2020 vision.
By 2020 opticians may have invented interactive glasses that can gague your vision and alter the lens strength automatically. Maybe we'll have bio-glasses made out of out own stem cells...
http://www.guardian.co.uk/society/2008/dec/22/diy-adjustable-glasses-josh-silver
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