It's one of the terms used to describe the eyes-closed visuals one can get on a psychedelic trip.
It's a bit of a misnomer in this case as light helps induce it but the effect is similar.
It's a bit of a misnomer in this case as light helps induce it but the effect is similar.
The first time I did this unexpectedly was a trip. I can't do this at will, and ignored it for a long time. I've recently started trying to see if I can control into it. I come out of this in an alert and super-relaxed state when I can get into that state.
edit: Forgot to mention that those "phosphene visuals" are exactly how I know I'm in this state.