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A public iris scanning device has been proposed in a patent from Samoff Labs in New Jersey. The device is able to scan the iris of the eye without the knowledge or consent of the person being scanned. The device uses multiple cameras, and then combines images to create a single scan (see diagram).

Iris recognition is a biometric identification system that requires a high-resolution picture of the irides of the subject’s eye. Pattern recognition software is then used to match that picture against future iris scans.

Iris scans are considered highly accurate; current iris recognition algorithms have an incredibly low false match rate. Good quality scans result in a “false match” less than one time per one hundred billion (this system has been used with excellent results in the United Arab Emirates).

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In the 2002 movie Minority Report, filmmaker Steven Spielberg shows Tom Cruise’s character walking through a mall. As he does so, public iris scanning devices repeatedly identify him, and then target him for personalized advertisements.

And only terrorists wear sunglasses, right?