Reality tunnel (aka belief system, world view, world model, reference frame, intentionality etc) ... coined by Timothy Leary and popularised by Robert Anton Wilson.
... the concept that with a subconscious set of filters formed from their beliefs and experiences, everyone interprets this same world differently, hence “Truth is in the eye of the beholder”.
This is not necessarily meant to imply that there is no objective truth; just that our access to it is mediated through our senses, experience, conditioning, prior beliefs, and other non-objective factors.
Through various techniques one can break down old reality tunnels and impose new reality tunnels by removing old filters and replacing them with new ones, new perspectives on reality - at will.
This is achieved through various processess of deprogramming using meditation, controlled use of hallucinogens, neuro-linguistic programming, cybernetics, hypnosis, bio-feedback devices, and forcibly acting out other Reality Tunnels.
The most ideal Reality Tunnel would be the most open one. ‘Believe Nothing; Explore Everything ‘is the main philosophy, so instead of travelling between Reality Tunnels you create one that encompasses everything.
Beliefs are considered dogma, they filter out much of reality.