Latest Invention: Novel Electronic Eyeglasses Instead of Bifocals

US firm developed a new type of lenses for eyeglasses thatuses electrical charge to change its focal distance.
The new emPower lenses will soon may replace old bifocals as they offer clear view at wider range of settings and will be very comfortable to wear.
The eyeglasses have lenses with liquid crystal with small amount of electrical current that is passed through it, which adjusts to the distance the wearer is looking at.
From Physics Great site infoniac.com
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