Take A Picture With Your Eyeball
Google is building their contact lenses with camera inside!

In the image below, you can see that the camera is below the pupil on the lens. As the wearer's gaze shifts, the contact lens will follow the shift in gaze, capturing/recording anything the user sees.

The contact lens contain a control circuit that includes a processing component that generates image information corresponding to scenes in a gaze of a wearer of contact lens and communicates that to a remote device (such as smart phone) with the camera and sensor.

The captured images can then be processed to detect light, colors, pattern of colors, objects, faces, motion, and more! Google noted that the analysis component can process raw image data to indicate whether the car is in motion and approaching the crosswalk and therefore reduce accident rate. In addition, the camera will be able to recognize faces and transmit that information to an earpiece for the blind.
Yi Yao compartió por primera vez: By Google Plus
via: http://goo.gl/NcPWIf

further reading: https://www.google.com/patents/US20140085601
further reading:  https://www.google.com/patents/US20140085599