Virtual reality is a form of technology which creates computer generated worlds or immersive environments which people can explore and in many cases, interact with. In technical terms it is straight-forward Virtual reality is the term used to describe a three-dimensional, computer generated environment which can be explored and interacted with by a person. That person becomes part of this virtual world or is immersed within this environment and whilst there, is able to manipulate objects or perform a series of actions.
The person wears a head-mounted display (HMD) or glasseswhich displays three-dimensional images as part of their experience. Some systems enable the person to experience additional sensory input, e.g. sound or video which contributes to their overall experience.