<unk>  is a subset of motion sickness that is typically experienced while playing video games from first-person perspective. It was discovered in the context of aircraft pilots who undergo training for extended periods of time in flight<unk> s. Due to the spatial limitations imposed on these<unk> s, perceived discrepancies between the motion of the<unk>  and that of the vehicle can occur and lead to<unk> . It is similar to motion sickness in many ways, but occurs in simulated environments and can be induced without actual motion. Symptoms of<unk>  include discomfort, apathy, drowsiness, disorientation, fatigue, and nausea. These symptoms can reduce the effectiveness of<unk> s in flight training and result in systematic consequences such as decreased<unk>  use, compromised training, ground safety, and flight safety. Pilots are less likely to want to repeat the experience in a<unk>  if they have suffered from<unk>  and hence can reduce the number of potential users. It can also compromise training in two safety-critical ways: # It can distract the pilot during training sessions. # It can cause the pilot to adopt certain counterproductive behaviors to prevent symptoms from occurring.<unk>  can also have post-training effects that can compromise safety after the<unk>  session, such as when the pilots drive away from the facility or fly while experiencing symptoms of<unk> .
Simulator sickness
Decompression sickness
Aerotoxic syndrome
Heat stroke
Ski sickness
Heat illness
Heat exhaustion
Shark attack