Basically, Virtual Reality (VR) means near-reality. It is an artificial environment that is created with software. VR allows a person to manipulate and experience the environment as if it were the real world. The computer is transformed into a gatekeeper to this artificial world by simulating as many senses as possible, such as vision, hearing, touch, even smell.
Commonly VR effect is created by special VR headsets. When users wear these headsets, they can view the virtual environment on a small screen of the head mounted display that is attached to the headsets. Users can also hear the sound by using the earphones attached with these VR headsets. VR environment can also be created through specifically designed rooms with multiple large screens.
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