Google has revealed details of its research into augmented reality glasses.
It posted a brief introduction to Project Glass, photos and a concept video at its Google+ social network.
The images show a minimalist design with a microphone and partly-transparent video screen that places information over the view from the users' right eye.
The product's developers said they wanted feedback on the idea.
They did not give any indication about when the device might go on sale or what it would cost.