Virtual reality offers an immersive way to experience therapy, training, and interactive environments. VR sickness, however, remains a challenge for many users VR users. This uncomfortable sensations, can cause nausea, dizziness, headaches, and tiredness. Why does this happen?

VR Sickness, like motion sickness, happens when there is a mismatch between what your eyes see and what your body feels. In VR, you might be moving within the simulation. However,  your inner ear (responsible for regulating balance) does not detect actual movement. Your brain interprets this confusion as a possible sign of poisoning. It panics and triggers nausea as a defense mechanism in order to prepare getting rid of the alleged poison. This is almost the same biological response people experience when reading in a moving car or feeling seasick,  except for the fact that in VR, the inner ear detects almost zero repositioning of the body. In a car, at least you are actually being moved around!