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Look, No Hands

Lawrence D'Oliveiro
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Eye-controlled computer interaction

I suspect you could increase the interaction bandwidth by recording more
than the length of the gaze; how about recognizing expressions around the
eye muscles as well? That way you could squint and glare to trigger more
behaviours. Or raise individual eyebrows to represent left-clicking versus
right-clicking, that kind of thing.

Or going beyond just the eyes, I suddenly thought of a Bewitched-style
twitch of the nose to signal double-clicking or something.
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