On Wednesday, Google previewed an initiative called Project Glass. The company created wrap-around glasses with a clear display that sits above the eye. The wearable-computing technology streams information to the lenses and allows the wearer to send and receive messages through voice commands. A built-in camera can take pictures and record video. A video released weeks ago by the search giant showed a man using the “Google Glasses”: moving through New York City, communicating with friends, navigating with maps, and snapping pictures.