Google Glass is a wearable computer with an optical head-mounted display (OHMD). It was developed by Google[8] with the mission of producing a mass-market ubiquitous computer.[1] Google Glass displays information in a smartphone-like hands-free format.[9] Wearers communicate with the Internet via natural language voice commands.[10][11] Google started selling Google Glass in the USA on April 15, 2014 for a limited period of time for $1500,[12] before it later became officially available to the general public on May 15, 2014 for the same price. Before that users were required to receive invitations before they could try Google Glass.
Google provides four prescription frame choices for $225.00 U.S and free with the purchase of any new Glass unit. It is necessary to remove a small screw in order to move the Google Glass from one frame to another. Google entered in a partnership with the Italian eyewear company Luxottica, owners of the Ray-Ban, Oakley, and other brands, to offer additional frame designs.[13]