UX Glossary · X
XR
Also: Extended reality · VR · AR · MR
The umbrella term for virtual, augmented and mixed reality, and the interaction problems they share.
XR covers the spectrum of immersive technologies: VR, which replaces the environment, AR, which overlays digital content on the real one, and MR, where digital objects are anchored to and interact with physical space.
What changes for design
Almost every convention. There is no fixed viewport, so layout becomes spatial. There is no cursor, so input is gaze, hands, controllers or voice. Depth is a real design variable, and so is the user’s body: reach, neck comfort and physical space become constraints.
Text is expensive. Reading in a headset is slower and more tiring than on a screen, which pushes interfaces toward spatial and audio cues rather than paragraphs.
The constraint that dominates
Comfort. Motion that does not match the vestibular system causes genuine nausea, and it can end a session permanently. Frame rate is therefore an accessibility requirement rather than a performance nicety, and artificial locomotion is one of the hardest problems in the field.
Session length is short. Headsets are heavy and warm, and designing for a 45-minute session usually means designing for something people will not finish.
In practice
Development tooling is a real part of the discipline: XR products are built, tested and monitored by teams who need their own interfaces, and those platforms have the same usability problems as any other developer tool.