Inclusion considerations
Inclusion considerations
Motion sickness and comfort
Technology that manipulates people's sense of space can cause discomfort or nausea, with VR sickness being a particularly salient example. Despite best efforts to align sensory inputs (e.g., matching visuals to vestibular cues), even minor delays between head movement and visual update can create sensory discrepancies that the brain interprets as disorienting (the widely quoted 20 ms motion-to-photon figure is an industry design target rather than a perceptual threshold; sensitive users can detect head-tracking lags well below this120). 120Providing user-controlled personalisation settings, allowing for a period of adaptation, avoiding contradictory sensory signals and incorporating regular breaks, can all help mitigate these effects.