GEOFF TOMPKINSON / SCIENCE PHOTO LIBRARY GEOFF TOMPKINSON / SCIENCE PHOTO LIBRARY
Virtual reality. A young girl in a virtual reality headset raises her hands in excitement against a special-effect background of zooming lights. Virtual reality headsets contain two small screens in front of the eyes, each dis- playing a computer-generated environment such as a room or corridor. The two screens show subtly different perspectives to create an illusion of immersion in a three-dimensional world. The headset responds to movements of the head, chang- ing the view accordingly so that the user can look around. Rocking movements or a hand-held trigger are used to walk forwards.
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