Safety of Immersive Virtual Reality for the Management of Parkinson's Disease.

Virtual reality (VR) has been used in research and clinical practice in the management of Parkinson's disease (PD), potentially enhancing physiotherapy. Adverse events (AEs) associated with VR applications in PD have been poorly explored. We conducted a randomized controlled trial to compare two 12-week interventions using physiotherapy and immersive VR, and analyzed the frequency and type of AEs occurring in 30 people with PD. We reported 144 AEs (8.4% of the sessions), predominantly classified as mild and unrelated to the interventions. Two were serious AEs, one leading to study discontinuation. Notably, discomfort/pain, motor fluctuations, and falls were the most frequently reported, accounting for 63% of the total AEs. Five falls were definitely associated with the 'sense of presence' provided by the fully immersive VR system, which underscores the necessity for careful game selection when designing interventions for PD. Motor fluctuations may have been associated with various factors, which merit further investigation. We also explored the role of SSQ as a measure of cybersickness in PD. In conclusion, it is important to closely monitor and characterize AEs to ensure safety and efficacy in clinical practice as AEs may be more common than previously recognized in VR interventions in PD.