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{{see also|Augmented Reality Devices}}
'''Optical see-through head-mounted display (OST-HMD)''', also called '''Optical head-mounted display''' or '''OHMD''', is a type of [[head-mounted display]] that projects images and allows the user to see through its display. OHMDs are used in [[augmented reality]] (AR). Unlike [[head-mounted display#Virtual Reality HMDs|Virtual Reality virtual reality HMDs]] that obscures obscure our vision of the real world, OHMDs allow us to see our surroundings while streaming data and image overlays in front of our eyes.
The focus of OST-HMDs such as the Hololens and Magic Leap 1 is usually set to about 1 or 2 meters in front of the face.
