A reality tunnel is a theoretical subconscious set of mental filters formed from beliefs and experiences, every individual interprets the same world differently, hence "Truth is in the eye of the beholder". The idea being that an individual's perceptions are influenced or determined by their worldview. The idea does not necessarily imply that there is no objective truth; rather that our access to it is mediated through our senses, experience, conditioning, prior beliefs, and other non-objective factors. The term can also apply to groups of people united by beliefs.