A button needs to be used to select theobject you are looking at otherwise you end up with the Midastouch(点石成金) effect, whereby everything you lookat gets selected by your gaze, says Turner. Imagine if your mouse clickedon everything it pointed at, he says.
Christian Holz, a researcher inhuman-computer interaction at Yahoo Labs in Sunnyvale, California, says thesystem is a nice take on getting round this fundamental problem of usinggaze-tracking to interact. EyeDrop solves this in a slick (灵巧的)way by combining it with input on the touch devices we carry withus most of the time anyway and using touch input as a clutchingmechanism, he says. This now allows users to seamlessly(无缝地) interact across devices far and close in a very naturalmanner.
While current eye-trackers are rather bulky,mainstream consumer devices are not too far away. Swedish firm Tobii isdeveloping gaze-tracking technology that can be installed in laptops andtablets and is expected to be available to buy next year. And the Google Glassheadset is expected to include eye-tracking in the future.
Turner says he has also looked at how contentcan be cut and pasted or drag-and-dropped using a mix of gaze and taps on atouchscreen. The system was presented at the Conference on Mobile andUbiquitous Multimedia in Sweden, last week.
36. The eye-tracker technology enables usto______
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