Optical see-through head-mounted display

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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 virtual reality HMDs that 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.

Vuzix is a provider of OST-HMDs.

A number of companies have marketed waveguides for OST-HMDs, including Dispelix, Digilens, and Lumus. However, these are largely not in products that an individual is able to purchase without acting on behalf of a larger organization.

Optical head-mounted display can cover only 1 eye such as the Google Glass or both eyes. Wearers can interact with the projected digital content through input methods such as voice commands, gestures and controllers.