emPower wants to change the way that you use your reading glasses. Now they will need to be charged. The emPower glasses have tiny batteries inside, which power microchips that are capable of turning extra reading power on and off as needed.
The idea is that these would phase out bifocals, which older people often need. These glasses will use liquid crystals to simulate the lower part of the lens in a pair of bifocals. The crystals can change how the lenses refract or bend light, similar to how standard glasses do this with different levels of thickness.