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| A distance meter adjusts the glycerine-based lenses in just 14 milliseconds. |
They're not very pretty, but prototype eyeglasses from University of Utah scientists could make progressive lenses obsolete for older people. Using electronically activated lenses and infrared distance meters, they can focus automatically on whatever you're looking at, whether it's far or close up. Once perfected, the device could eliminate the need for multiple pairs of reading or driving glasses for folks with presbyopia or farsightedness.
Age-related far- or nearsightedness happens when the lenses in your eyes can no longer change focus between objects. As a result, many people between their 40s and 50s have to wear progressive-lens eyeglasses divided into small focal zones depending on object distance. One company called Deep Optics has pursued an auto-focusing solution using see-through liquid-crystal lenses, but is still working on a practical prototype. Google is also working on an auto-focus contact lens with Novartis, but recently said that it wouldn't be testing one anytime soon.
