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'''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 HMDs]] that obscures our vision of the real world, OHMDs not only allow us to see our surroundings but also enhance our them by streaming data and image overlays in front of our eyes.