RAC (Retinal Alien Check) drones are drones that were implemented by the government two years after the war against the invading Luxen.
The RAC usually hoover about five feet off the floor and are all black with the exception of a white light in the center of the top. The RAC drones are able to examine the pupils and recognize nonhuman pupils. They use infrared technology and picks up on alien DNA.
They go around searching for unregistered Luxen, aliens who are not wearing a disabler.
Luxen, and Origins alike have found ways around RAC drones by developing and wearing special contact lenses that throw off the drones and make them pass off as humans.