Aha! A useful application for Google Glass, rather than just fancy tech for the wealthy. I'm sure there are other useful applications where handsfree might be beneficial, such as those working at heights, or in emergency situations where, perhaps, sound control wouldn't work.

Google Glass has been hacked so that it can be controlled by brainwaves.

By combining the smart glasses with an electroencephalography (EEG) headset, the software makes it possible to take a picture without moving a muscle.

London-based start-up This Place said the tech could be utilised in high-pressure hands-free situations - such as during surgery.Google Glass Hack With Added Brainwave Control [bbc.co.uk]