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Photos: Eye on 'switchable' lenses

Researchers demonstrate flat lenses with focusing power that adjusts based on what the person is viewing.

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1 of 2 Bill Detwiler/ZDNet

switchable liquid crystal diffractive lenses

Researchers at the University of Arizona have demonstrated eyeglass lenses, or what's called switchable liquid crystal diffractive lenses, that could potentially replace biofocals for far-sighted people. The flat lenses have focusing power that adjusts based on what the person is viewing.

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2 of 2 Bill Detwiler/ZDNet

prototype

Switchable liquid crystal lenses: a prototype of the assembled adaptive eyewear.

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