Virtual Reality places a screen in front of your eyes so that you only see a virtual 3D world. Augmented Reality places a digital layer over reality and Mixed Reality places digital objects in reality.
How does it work?
With AR and MR, the device being used transmits a live image of real-world conditions which is then enriched with computer-generated output, such as sound, video, images or GPS data. In VR, this reality is completely created by the computer.