Virtual reality sickness (also known as cybersickness) occurs when a person's exposure to a virtual environment causes symptoms that are similar to motion sickness symptoms. Women are significantly more affected than men by headset-induced symptoms, at rates of around 77% and 33% respectively. The most common symptoms are general discomfort, headache, stomach awareness, nausea, vomiting, pallor, sweating, fatigue, drowsiness, disorientation, and apathy. For example, Nintendo's Virtual Boy received much criticism for its negative physical effects, including "dizziness, nausea, and headaches". These motion sickness symptoms are caused by a disconnect between what is being seen and what the rest of the body perceives. When the vestibular system, the body's internal balancing system, does not experience the motion that it expects from visual input through the eyes, the user may experience VR sickness. This can also happen if the VR system does not have a high enough frame rate, or if there is a lag between the body's movement and the onscreen visual reaction to it. Because approximately 25–40% of people experience some kind of VR sickness when using VR machines, companies are actively looking for ways to reduce VR sickness. https://www.youtube.com/watch?v=IwGfeMrPYmw&t=1s
Because of just how expensive it is to invest in high-end VR, companies have worked hard to bring us affordable VR that can run on those handy supercomputers we all carry around in our pockets. Thus, here are the best headsets you can slip your phone into. They're generally wireless and many are under £100, so it's a whole different ball game to the beasts above. Be careful though, certain devices only work with certain phones, so check before putting down any cash. https://www.aliexpress.com/item/MISECU-5-0MP-3-0MP-1-3MP-360-degree-VR-Audio-128GB-slot-Wireless-IP-Camera/32830686032.html
Many other companies are developing Virtual Reality headsets and other peripherals. Upcoming hardware includes the GenBasic Quad HD, StarVR StarOne, Vrgineers XTAL and Pansonite VR Headset. As more and better hardware hits the market, it will continue to power a growing ecosystem of hardware manufacturers, software developers, and content providers. https://www.youtube.com/watch?v=H6SsB3JYqQg&t=1s
Google and Samsung still offer phone-based VR headsets in the form of the Daydream View and the Gear VR, and even Nintendo has gotten into the game with its Labo VR Kit for the Nintendo Switch. However, these shell-like headsets, which require a phone or some other device physically inserted into them, feel like novelties next to more powerful headsets that can provide more immersive experiences. https://www.youtube.com/watch?v=dAzHtLXxQsM&t=1s
However, because the Lighthouse sensors need good vantage points to track all your head and hand movements, it means mounting them up high. This makes setup for the Vive a bit convoluted compared to, say, the Rift or PSVR. For the Rift, you can just plop down the sensors on a desk, though to get the same 360 tracking you'll need to buy an extra sensor (the Touch bundle gets you two). However, when you get Lighthouse all ready the effect is next-level – enough to make using the PlayStation VR or Rift feel like a step back at times. https://www.aliexpress.com/item/Insta360-ONE-4-Karat-360-VR-Video-Sport-Action-Kamera-24MP-Kugel-Zeit-6-achsen-Gyroskop/32836758396.html
^ Bukhari, Hatim; Andreatta, Pamela; Goldiez, Brian; Rabelo, Luis (2017-01-01). "A Framework for Determining the Return on Investment of Simulation-Based Training in Health Care". INQUIRY: The Journal of Health Care Organization, Provision, and Financing. 54: 0046958016687176. doi:10.1177/0046958016687176. ISSN 0046-9580. PMC 5798742. PMID 28133988. https://www.youtube.com/watch?v=k4vRFodAqWo&t=1s
To create a feeling of immersion, special output devices are needed to display virtual worlds. Well-known formats include head-mounted displays or the CAVE. In order to convey a spatial impression, two images are generated and displayed from different perspectives (stereo projection). There are different technologies available to bring the respective image to the right eye. A distinction is made between active (e.g. shutter glasses) and passive technologies (e.g. polarizing filters or Infitec). https://www.aliexpress.com/item/Presale-Insta360-ONE-4K-360-VR-Video-Action-Camera-Sport-Camera-24MP-Bullet-Time-6-Axis/32831111466.html
The PlayStation VR is compelling thanks to Sony backing development for it and the affordability and availability of the PlayStation 4 compared with gaming PCs. All you need is the headset, a PlayStation 4, and a PlayStation Camera (now included with most PlayStation VR bundles). There are some excellent games on PS VR like Moss, Rez Infinite, and Until Dawn: Rush of Blood, with Sony and other developers working on several more (including Five Nights at Freddy's VR).