Some people may experience discomfort in the form of eye strain, fatigue, nausea, or motion sickness when watching video content or playing games. Sony recommends that all viewers take regular breaks while watching video content or playing games. The length and frequency of necessary breaks varies from person to person, so use your judgment. Stop watching the video images or playing games for a while if you begin to feel uncomfortable, and contact a doctor if necessary.
Avoid wearing the head mounted unit in environments where your head may shake, or while you are walking or moving, because it will increase the likelihood of discomfort.