How Does Virtual Reality Work?

Everyone’s talking about Virtual Reality, but what exactly is it, and how does it work?

In short, it all has to do with a computer doing its best to trick your brain. A virtual reality headset shows you an image and as soon as you move your head it modifies that image to make it seem like you’re really there. 3D audio can also enhance the experience and make you forget your physical surroundings.

What can this technology be used for? Movies and gaming is an obvious option, but virtual reality has a slew of other possible uses. It can be used for training, medical procedures, and even psychological therapy to treat disorders like PTSD.

With all the possibilities in store for VR, it seems like it’s only a matter of time before it becomes commonplace.

Read more here.

See The Incredibly Goofy Evolution of Virtual Reality Headsets

1988 Andrew Mishkin wearing a 3-D virtual display helmet that is connected to a six-wheeled roving vehicle. The rover was meant to explore the surface of Mars and send back information.

Roger Ressmeyer—Corbis

1993 "Reality +" at the Virtual Reality Systems 93 show was described as a next generation, multi-player virtual reality entertainment system that gave a high sense of movement in a computer-generated world revealed in a head-mounted display.

Alex Brandon—AP

1993 The 3-player Budweiser virtual reality mask at the Food Marketing Institute's International Supermarket Industry Convention and Educational Expostion in Chicago.

Mike Fisher—AP

1993 A Virtual Reality contraption at the Sci Fi Channel booth at The National Cable Television Association annual convention, in San Francisco.

George Nikitin—AP

1994 Soldier training using a virtual reality-simulated 3-D shootout at an Army facility.

Ben Van Hook—The LIFE Images Collection/Getty Images

1995 A visitor checking out a virtual reality head-set at the G7 Information Society Showcase taking place at the European Parliament. The head-set was linked to a camera elsewhere in the building which the visitor could control through head movements.

STR/Reuters

1998 A researcher at Tokyo University's Intelligent Modeling Laboratory wearing 3-D glasses, extending his hands to touch carbon atoms in the microscopic world at the laboratory's virtual reality room.

Yoshikazu Tsuno—AFP/Getty Images

1999 Visitors enjoy virtual reality driving with 3-D goggles and driving simulators for the presentation of Japan's automaker Nissan at the Tokyo Motor Show in Tokyo.

Kazuhiro Nogi—AFP/Getty Images

2003 A visitor to the " Ars Electronica in a dish installation " Humphrey II" , which allowed virtual free flight through a 3D reconstruction of the city of Linz.

Peter Zschunke—AP

2005 A girl wore a full color head mounted display with a built-in camera as Japan's machinery maker Hitachi Zosen and Shimadzu unveiled a wearable computer, consisting of the HMD and a palm sized Windows XP PC with a pointing device at a virtual reality exhibition in Tokyo.

Yoshikazu Tsuno—;AFP/Getty Images

2006 Lt. David Shipley of the Adams County Sheriff's Department watched an interactive video that replicated the experiences of a schizophrenic patient having auditory and visual hallucinations while attempting to refill a prescription at a pharmacy.

Karl Gehring—The Denver Post/Getty Images

2008 Valeria Petkova, right, and student Andrew Ketterer, left, of the Karolinska Institute in Stockholm, tested the 'body-swap' illusion, a method whereby people can experience the illusion that either a mannequin or another person's body is their own body.

Niklas Larsson—AP

2012 Raphael Pirker from Switzerland, founder of Team BlackSheep used virtual reality goggles to simulate the sensation of flight in the real world during a demonstration, flying from the perspective of a model aircraft, during a session of LeWeb'12 in Saint-Denis, near Paris.

AFP/Getty Images

2012 A man seeking a job was equipped with 3D spectacles with sensors as he trained in Clermont-Ferrand, central France with avatars (background) in a virtual reality cube, at business incubator Pascalis.

Thierry Zoccolan—AFP/Getty Images

2012 Peter Kenny Jan Torpus, director of Lifeclipper project, tested the immersive augmented reality equipment in St Johanns Park in Basel, Switzerland.

Sebastien Bozon—AFP/Getty Images

2013 Professor Karl Oldhafer, chief physician of general and visceral surgery at the Asklepios Hospital Hamburg-Barmbek, before liver surgery. Oldhafer used augmented reality, which allowed the liver to be filmed with an iPad and overlaid during the operation with virtual 3D models reconstructed from the real organ. This procedure helped locate critical structures such as tumors and vessels and was expected to improve the quality of transferring pre-operational resection plans into actual surgery.

Fabian Bimmer—Reuters

2014 British television presenter Rachel Riley showed a virtual-reality headset called Gear VR during a Samsung event ahead of the consumer electronic fair IFA in Berlin.

Markus Schreiber—AP

2014 Tim Draper, Founder and Managing partner of 'Draper Fisher Jurvetson', tried out the latest in virtual reality technology the 2014 Kairos Global Summit at Ritz-Carlton Laguna Nigel in Dana Point, California.

Jerod Harris—Getty Images for Kairos Soceity

2014 A man played a game with the virtual reality head-mounted display 'Oculus Rift' at International Games Week in Berlin. The display transfers the eye movements to the game in real time.

Daniel Naupold—Daniel Naupold/picture-alliance/

Microsoft's Lorraine Bardeen demonstrates HoloLens headset during an event at the company's headquarters in Redmond, Wash. on Jan. 21, 2015.

Elaine Thompson—AP

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Write to Arpita Aneja at arpita.aneja@time.com.