The laser that kept jabbing Hiro in the eye was shot out of this guy's computer, from a peripheral device that sits above his goggles in the middle of his forehead. A long-range retinal scanner. If you turn toward him with your eyes open, the laser shoots out, penetrates your iris, tenderest of sphincters, and scans your retina. The results are shot back to CIC, which has a database of several tens of millions of scanned retinas. Within a few seconds, if you're in the database already, the owner finds out who you are. If you're not already in the database, well, you are now.