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Philips, the electronics company, has invented and patented a way to track the gazes of window shoppers. The tracker can determine what item is being looked at, then larger pictures, slideshows, or more information is displayed on nearby screens.

At least one detector will be configured to detect the gaze of shoppers. A processor can then calculate how long someone looked at a particular item. It then identifies the most looked at items and even how often longing gazes were directed on a particular object. The invention could also be used at art galleries and museums for delivering visitor specific information.