Virtual Reality (VR) is the use of computer technology to create a simulated environment…VR places the user inside an experience. Instead of viewing a screen in front of them, users are immersed and able to interact with 3D worlds. By simulating as many senses as possible, such as vision, hearing, touch, even smell, the computer is transformed into a gatekeeper to this artificial world. (Source: MARXENT Labs)
VR headgear styles, functions and prices very greatly. Google Cardboard heargear can be bought from $10 and up while an eager anticipated headset called, Vive VR is available via pre-orders for $799. Here are some examples:
Virtual reality or virtual realities (VR), also known as immersive multimedia or computer-simulated reality, is a computer technology that replicates an environment, real or imagined, and simulates a user’s physical presence and environment in a way that allows the user to interact with it. Virtual realities artificially create sensory experience, which can include sight, touch, hearing, and smell.
Most up-to-date virtual realities are displayed either on a computer screen or with a special virtual reality headset, and some simulations include additional sensory information and focus on real sound through speakers or headphones targeted towards VR users. (source: Wikipedia > Virtual Reality)
About Headsets, Wikipedia.com says,
A virtual reality headset is a head-mounted device aimed to provide an immersive virtual reality experience, for the purpose of computer games and 3D simulations. It consists of a stereoscopic head-mounted display (providing separate images for each eye) and head motion tracking sensors (which may include gyroscopes, accelerometers, structured light systems, etc). Some devices also include headphones, eye tracking sensors and gaming controllers. (Source: Wikipedia > Virtual Reality Headsets)
‘What is Virtual Reality and How does it work? (Mashable Explains)