Smart Glasses: Dynamically Changing Lenses to Replace Bifocals

Here's a pair of glasses from PixelOptics that replace bifocals, changing from distant vision to close-up with the flick of a switch. Sure, this prototype is rather odd-looking, but its developers say future versions will be indistinguishable from conventional eyeglasses. The technology works using an extremely thin… » 4/04/06 12:47pm 4/04/06 12:47pm