Virtual Reality

Definition:

• Virtual reality is a computer-simulated (replicated) environment, in which a hypothetical three dimensional visual world is created by a computer.
• The user wears special goggles, fiber optic gloves, and other materials that enable us to enter and move about in this world, and interact with objects as if inside it.
Examples and pictures:

1. For years now, virtual environments have been used to treat anxiety problems with exposure therapy. Psychologists treat phobias and post traumatic stress disorder by exposing the patient to the thing that causes them anxiety and letting the anxiety dissipate (dissolve) on its own.
2. Virtual reality environments have also been used for training simulators. The earliest examples were flight simulators, such as Microsoft Flight Simulator.

http://cache.gawkerassets.com/assets/images/8/2009/06/AC97-0295-13_a_01.jpg
3. Modern medicine has also found many uses for virtual reality. Doctors can interact with virtual systems to practice procedures or to do tiny surgical procedures on a larger scale. Surgeons have also started using virtual "twins" of their patients, to practice for surgery before doing the actual procedure.

http://io9.com/5288859/7-virtual-reality-technologies-that-actually-work
4.  The Nintento Wii is one of the most successful games of virtual reality. The Wii owes its motion capture and intuitive interaction concepts to the virtual reality technologies of the past.
      http://io9.com/5288859/7-virtual-reality-technologies-that-actually-work