Head-mounted displays
Basic features
- Can display either stereo or mono images depending on type
  
    - Stereo images (binocular disparity)
    
 - Same image twice (binocular concordance)
    
 - Single image (uniocular)
  
  
 - May be totally immersive or see-through
 - May include a built-in head-tracker
 - May have built-in stereo headphones
  
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