While knowing the cause of something doesn't always help you cope with the moment, it's helpful to get a little knowledge anyway. So VR makes people feel bad because it causes motion sickness (opens in a new tab). When your brain thinks you're moving, but your body is static, it creates a disconnect between the two of you that causes enough confusion to make you feel bad. virtual reality disease occurs when exposure to a virtual environment causes symptoms similar to symptoms of motion sickness.
The most common symptoms are general malaise, headache, stomach feeling, nausea, vomiting, pallor, sweating, fatigue, drowsiness, disorientation and apathy. Other symptoms include postural instability and retching. Virtual reality disease is different from motion sickness in that it can be caused by visual perception of one's own movement; real self-movement is not necessary. It is also different from simulator disease; non-virtual reality simulator disease tends to be characterized by oculomotor disorders, while virtual reality disease tends to be characterized by disorientation.
Virtual reality games simulate situations that contain a lot of movement. Because the body is still while playing, this can cause motion sickness to occur in the same way as moving vehicles. Some people experience motion sickness in virtual reality, which means that when they put on headphones and enter a virtual world, they feel dizzy or nauseous. If you're one of those people who've experienced motion sickness from virtual reality, that doesn't mean you'll experience it forever.
It is possible to mitigate the feeling of nausea and even overcome the problem completely. Start with games or simulations where there is little movement, such as 3DOF, where the virtual scene around you is relatively static. In virtual reality, this essentially means that if you stay still and the virtual environment around you moves, you alter the balance of the brain and you start to feel nauseous. Sensory conflict theory provides a framework for understanding motion sickness; however, it can be applied to VR dizziness to better understand how it can occur, and is commonly used for that purpose.
Another trigger for virtual reality disease is when there is a disparity in apparent movement between visual and vestibular stimuli. Virtual reality (VR) may be the wave of the future for some people, but for others it may just feel like a wave of nausea. For example, headphones like the HTC Vive have 6DOF, which will help you feel more oriented when moving your head or body in VR, since the virtual scene will move with you. Developers incorporate unnatural actions into their games, such as quick spins, and what would make a person sick in the real world will make them sick even when experienced in virtual reality.
There are several technical aspects of virtual reality that can induce diseases, such as mismatched motion, field of view, parallax of motion, and angle of view. In virtual reality, the eyes transmit that the person is running and jumping through a dimension, however, the ears transmit that there is no movement and that the body is still. People who experience this side effect after being exposed to virtual reality environments may experience symptoms of nausea and vomiting, along with discomfort, drowsiness, disorientation, and fatigue. The VR revolution hasn't happened yet, despite promising growth and technological advancements such as Microsoft's HoloLens 2 and Facebook's Oculus Rift.
If the virtual environment moves differently than what the eye expects, there is a conflict between what the brain expects the eye to see and what it actually sees. Fortunately, the same strategies that prevent and relieve motion sickness in the real world can also be used to combat motion sickness in the virtual world. Another element to keep in mind is that motion sickness in virtual reality could occur due to the unknown eye movement that is required to keep the virtual scene stable in the retina. The good news is that you can adopt some simple practices to compensate for and even prevent the dizziness, nausea and headaches of playing virtual reality; you just need the knowledge.
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