Camera Tracks Eye Movements from Distance

"A camera that monitors eye movements from up to 10 metres away makes it possible for smart billboards that track the attention of passers-by. Until now, eye-tracking systems have only worked over about half a metre." Developed by Roel Vertegaal, a Canadian professor, the device is called eyebox2 and costs $999. More at and New Scientist Tech. Tech specs (pdf).
-- thank you, John

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