The Atlantic runs through the various early prototypes of Google Glass:

How do you make a computer that people will want to wear on their face? “You have to make it light,” says Isabelle Olsson, the lead designer of Google Glass, the computer-equipped eyewear. “You can’t expect people to wear goggles all day long.” Over years of trial and error, Olsson guided Glass through hundreds of bulky prototypes to its current sleek (if not necessarily stylish) look. Here’s how Google’s computer went from goggles to Glass.

2010: The first Glass prototype “was literally a backpack,” says Thad Starner, a computing professor who developed the early technology. Testers wore an augmented-reality headset strapped to a bag that held equipment including a touch pad and a Webcam. The developers also put a screen on testers’ chests to project what they were seeing through the glasses.

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