Retinal Scanner

Retinal Scanners are electronic devices in Deus Ex. A retinal scanner can be found at the entrance to the underground section of the UNATCO Headquarters where it effectively functions as an interactable switch to open the entrance door.

During the first visit to the headquarters, UNATCO trooper Scott will explain to JC the scanner's capabilities: "The retinal scanner can read blood-vessel patterns right through your sunglasses."

Trivia

 * The retinal scanners that would give access to the Liberty Island MJ12 lab are meant to give the message "Retinal Pattern Mismatch: Agent Denton Unauthorized For Entry", but don't due to an oversight.
 * The final retinal scanner at the entrance to UNATCO during chapter 5 is also meant to give the message "Retinal Patter [sic] Malfunction: General Protection Fault 0012E9023" and potentially trigger security, but doesn't.