Here is an interesting new invention. PixelOptics invented a new kind of lenses which can change focusing by applying electrical current. The new lenses have a thin layer of liquid crystals which change orientation thus changing the focus point! The focus is changes according to the will of the user, by touching or by moving the head up or down. A built-in rechargeable batter can operate the glasses for 2 to 3 days, and needs 8 hours to be recharged. The glasses are expected become available this year, and the price will be kinda high, around $1.000.