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Virtual Reality is a computer system or interface that generates real-time synthetic environments, representing things through electronic means or representations of reality, an illusory reality, because it is a perceptual reality without objective support without extensive network, and that exists only inside the computer. Therefore it can be argued that virtual reality is a pseudorrealidad alternative perceptually speaking.

Virtuality establishing a new relationship between the use of the coordinates of space and time, overcomes the spatial and configure an environment in which information and communication accessible prospects show up yet unknown at least in terms of volume and potential.

Virtual reality can be of two types: immersive and non immersive. Methods immersive virtual reality is often linked to a three-dimensional environment created by a computer, which is handled through helmets, gloves or other devices that capture the position and rotation of different human body parts. Non-immersive virtual reality also uses the computer and uses media such as the Internet now offers us, in which we can interact in real time with different people in spaces and environments that do not really exist without the need for additional devices to computer .

non-immersive virtual reality offers a new world through a desktop window. This approach has several advantages immersive not focus on immersive as the low cost, easy and rapid user acceptance. Immersive devices are expensive and usually the user prefers to manipulate the environment through virtual devices are familiar as the keyboard and mouse through heavy helmets and gloves.

The high cost of devices in widespread use immersive virtual environments easily manipulated by simple devices, such as the example of the important business of the consoles or games where many users interact via the Internet. It is through the Internet and VRML was born, which is a standard for the creation of these non-immersive virtual worlds, providing a set of primitives for three-dimensional modeling allows behavior to objects and assign different animations that can be activated by users.

Finally it should be noted some complications that make virtual reality systems, in regard to treatment of diseases related to mobility problems. An example of this is done with snowboard simulators, achieving progress in the treatment of patients.

Source: http://es.wikipedia.org/wiki/Realidad_virtual