Frequently asked questions on health and safety
Why do some people feel ill in VR?
It's a widespread belief that all VR causes vertigo and nausea. This problem happens when your brain has difficulty adjusting to the discrepancy between your eyes and inner ear. When your eyes detect motion and your ears communicate that you're standing still, some individuals' brains may react by inducing dizziness and nausea. Some people who are more susceptible to motion sickness may be more sensitive to this phenomenon, while others may not have an issue with it.
Several things at the hardware level and some in AltspaceVR's software can reduce or eliminate the nausea-inducing motion in VR.
Hardware-based nausea reduction
Contemporary VR hardware like the Oculus Rift and HTC Vive reduces motion sickness by presenting video frames at a rate that eliminates the latency that can cause nausea. If the software is optimized, as AltspaceVR is, then there's no perceived delay when you turn your head in VR. The accelerometers in the HMD are communicating movement and transmitting that telemetry faster than the human eye can detect any latency. On HMD models outfitted with positional cameras, this goes a step further. Not only is rotational movement represented, so is lateral (side to side) motion.
Software-based nausea reduction
In addition to hardware improvements and framerates, AltspaceVR has implemented several features that help people reduce and eliminate nausea:
- Teleporting - Moving instantaneously from point to point doesn't communicate motion to the brain, thereby eliminating motion sickness.
- Snap Turning - On all hardware, AltspaceVR provides means for "ratcheted" or "stepped" rotation of the view in VR. In other words, when turning, your view will pivot about 20 degrees of rotation. Again, this doesn't trigger nausea in most people.
- Snap Motion - On particular hardware, swiping forward on the touchpad will move the perspective forward in an increment that doesn't trigger motion sickness.
How to eliminate motion sickness
Try not to move around too much using the controllers. Instead, rotate your head up or down to look around in VR.
Don't Use a Mouse/KB or Controller
AltspaceVR offers users the option to use standard gaming peripherals such as Mouse/Keyboard and Game controllers to move in VR as you would in a video game. This option includes multi-directional movement, strafing, and a turbo button. We recommend using these only after becoming accustomed to being in VR. Even then, take it slow.
You Can Always Bail Out
If you experience nausea, remove your HMD immediately. Regain your equilibrium, calm your stomach, and return to the VR environment. Try to remember the movement that caused the sensation and refrain from repeating it.
Know When it's Time to Exit VR
Most importantly, know when it's time to take a break. You know your body and listen when it's giving you a strong indication that something is wrong. Take a break and get some air. Walk around and realign your equilibrium. Once you feel good again, come back, we're confident the party will still be going on!
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