A new breed of devices harnesses the power of the unconscious, unearthing realizations you didn’t know your brain had reached. Popular Science writes:
Soldiers scanning the battlefield for threats may soon get a new tool: a brain-scanning set of binoculars that can pick up on a soldier’s unconscious recognition of a potential threat and bring it to his conscious attention. It’s just one of many ways DARPA and other military research groups are looking to have soldiers mind-meld with their machines and materiel, and it demonstrates how remarkably close we are to deploying mind-control on the battlefield.
The specific binocular device that DARPA is developing is known as Sentinel (for System for Notification of Threats Inspired by Neurally Enabled Learning), and it basically uses the power of the human brain to scan and filter imagery in realtime, picking up on both what the soldier recognizes consciously and what his unconscious might perceive as well. Through electroencephalogram (EEG), the device can pick up on a brain signal known as P300 that signifies an unconscious recognition of something visual.