Virtual reality is a computer-simulated environment that simulates physical presence in both the real world and imaginary worlds. Virtual reality artificially creates sensory experiences, including sight, sound, touch, and smell.
Virtual reality technology primarily consists of virtual reality headsets, sometimes called head-mounted displays (HMDs), which provide stereoscopic images or video, and omnidirectional treadmills, which allow users to experience virtual reality that can be viewed with the naked eye. Simulated environments can resemble the real world to create realistic experiences-for example, products used to train military personnel (and, by extension, civilian employees). [1] Virtual reality consists of 2D/3D graphical renderings that are provided to the user's perception using 3D goggles or other devices that provide stereoscopic displays.
Virtual reality replaces all physical senses with virtual ones, creating immersive environments that simulate touch, taste, sight, and sound. Users can interact with objects or people in the VR environment using specially designed peripherals such as keyboards and game controllers.
Virtual reality also refers to immersive environments that have a 2D or 3D representation of the real world that can be explored and interacted with (often using a controller). These experiences can be inherently realistic or fantastical. Some advanced haptic systems now include haptic information, often referred to as force feedback in medical, video game, and military training applications.
Immersive environments can resemble the real world to create realistic experiences-for example, flight simulator software.
Some VR systems used in video games can transfer vibrations and other sensations to the player via a game controller. Virtual reality also refers to telepresence environments, where a user's virtual presence is provided through telepresence or the use of virtual artifacts (VA), whether through the use of standard input devices such as keyboards and mice or through multimodal devices such as wired gloves or omnidirectional treadmills. Immersive environments can resemble the real world to create realistic experiences - for example, VR systems that allow surgeons to train in "touch time" so they can operate on patients without incisions.