Virtual reality
Around the same time, Douglas Engelbart used computer screens both as input and output devices. In 1968, Ivan Sutherland, with the help of many students including Bob Sproull, created what was widely considered to be the first head-mounted display (HMD) system for use in immersive simulation applications. It was primitive both in terms of user interface and realism, and the HMD to be worn by the user was so heavy that it had to be suspended from the ceiling. The graphics comprising the virtual environment were simple wire-frame model rooms. The formidable appearance of the device inspired its name, The Sword of Damocles.
Meron Gribetz
In 2016, Meron Gribetz introduced the Meta 2 at TED conference (TED). The Meta 2 consisted of an augmented reality headset that maked it possible for users to see, grab, interact with, and move holograms in a natural fashion. At TED, Gribetz suggested this new technology was designed to allow users to interact with virtual objects yet maintain their sense of presence and interaction with their natural surroundings rather than being focused or distracted by traditional 2D computer screens.