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If you're cursed with bifocals or fear they're in your future, you'll be glad to know optical scientists at the University of Arizona have been working on liquid-crystal eyeglass lenses that can switch focus on command.

The technology is still fairly clunky and the lenses don't auto-focus yet, but when the lenses have slimmed down and can focus automatically, bifocals will become a thing of the past—and you won't have to change lenses whenever you get new prescriptions either, since the doctor will be able to enter the new ones into your glasses. A firm called Pixel Optics is working on commercializing the idea now, after buying the patents from Johnson and Johnson Development Corp, which licensed them from the University and funded their research.


UA Optical Scientists Develop Switchable Focus Eyeglass Lenses []
Liquid-crystal eyeglasses make bifocals obsolete [SciFi Tech]