A new device may be joining smartphones, iPads and music players that you have to charge overnight: electronic eyeglasses. These glasses have tiny batteries, microchips and assorted electronics to turn reading power on when you need it and off when you don't.
The new electronic spectacles, called emPower, have an unusual insert in the bottom part of the lenses: liquid crystals, cousins to the familiar ones in television displays. The crystals change how the lenses refract or bend light, just as varying levels of thickness do in traditional glasses.
The glasses, made by PixelOptics in Roanoke, Va., will be on the market this spring.
Full story from the New York Times