Reality Tunnel
A reality tunnel is a term used to describe an individual's unique perception of reality, shaped by their personal filters and cognitive biases. The walls of the reality tunnel are reinforced by confirmation bias, which is our tendency to notice and assign significance to observations that confirm our preexisting beliefs, while filtering out or rationalizing away observations that do not fit with our prior beliefs and expectations. This self reinforcing mechanism helps to explain why reality tunnels are usually transparent to their inhabitants creating the objectivity assumption. While it seems most people take their beliefs to correspond to the "one true objective reality," each person's reality tunnel is their own artistic creation, whether they realize it or not.
It is believed that through the use of psychedelics one can break down old reality tunnels and impose new reality tunnels by removing old filters and replacing them with new ones creating new perspectives on reality.