Virtual reality is stimulating the user’s senses in such a way that a computer generated world is experienced as real. The computer presents the stimulating 3-D environment which creates sense of presence and deeply engaged by providing the interface using display devices like Head-Mounted Display (HMD), Binocular Omni-Orientation Monitor (BOOM), &Cave Automatic Virtual Environment (CAVE).The participant interacts with computer generated 3-D world through input devices like Data Gloves, Joysticks, Hand-Held Wands, & Body Sensors. Virtual world gives mental support to people with disabilities, cancer, AIDS, strokes, depression and other ailments, there by giving them second life. Its other applications include simulation of surgical incision, Virtual Prototyping, & Information Visualization. Thus, virtual reality brings the imagination as close and realistic as reality itself.

In short, virtual reality is the simulation of another world, the world in which the user can see through his own eyes, the world in which a user can experience his desires, aspirations virtually and do it really, and the world which can be rightly called as his second life.

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