Similar thing with the MASS system in a Black Mirror episode (Men Against Fire) where visual reality could be substituted by your implants (or rather using your

Similar thing with the MASS system in a Black Mirror episode (Men Against Fire) where visual reality could be substituted by your implants (or rather using your implants, and by the people in control of them). And again in the Christmas special, which was more similar to this device in that it would block out certain things, or everything (though it was in software, and again under external control). Which sounds horrifying enough but was far from the worst thing in the episode.