Red-eye reduction works by detecting the retina and canceling out its effects. The eyebox2 takes that one step shorter -- all it wants to know is whether you're looking at it. While currently a dream-come-true gadget for marketers wondering if a given poster or billboard is even getting any attention, expect similar technology to turn up in everything from subpoenas to invitations to your nauseous cousin's New Year's Eve party -- because unlike previous eye-tracking tech, this is cheap. Normally the rig goes for around £12,000, but this starts at about £500 -- nearly affordable enough to start embedding in those stop signs your lawyer said you didn't see. [GT] eyebox2 (via Gizmowatch) Related posts GPS pay-as-you-go for cheaper car insurance or big brother passenger? Creative's Big Brother webcam Snooper Strabo - sat nav and enhanced speed camera warning system