Virtual reality is an experience. The participant is presented with a computer-generated simulation of a three-dimensional image or environment which is so realistic that your brain cannot differentiate it from reality. The term has been used to describe many types of virtual experience, from held devices, headsets, goggles and even full body suits that are made to register where you are and position you into a virtual space using those co-ordinates. The basic Virtual Reality experience is not defined by gadgets but by perception. The impression that the person having the experience is engaging with a simulated environment 'as if' it were real. Interactions are therefore seemingly real or physical in the way the person is experiencing them. Whether it be through using special electronic equipment, such as a helmet with a screen inside or gloves fitted with sensors, or simply through a computer and a screen, with video and audio impressions.