Eye-controlled earphones let you pick up phone calls with a glance

The Japanese wireless carrier NTT DoCoMo has recently developed and demonstrated a peculiar pair of headphones that can precisely detect a user's eye movements without a camera, and use those movements to control electronic devices such as mobile phones and portable music players. DoCoMo started working on this idea back in 2008 by adapting an electrooculogram (EOG), a medical device used for measuring eye response, to their purposes. An EOG works on the principle that the human cornea has a positive electrical charge. As the user looks to the left or right, the charge shifts in the space between the user's ears – a change that can be easily detected by appropriate sensors.

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