They require:

1. A display (e.g., waveguide, birdbath optics) to project images.
2. A processor & battery to run software.
3. Sensors (cameras, gyroscopes, accelerometers) to track head movement and the environment.
4. Connectivity (Bluetooth/WiFi) to sync with other devices.

#Common confusion:

· Smart Glasses (like Meta Ray-Bans) have cameras and speakers but no display. These are not AR glasses (they are "audio/video glasses").
· AR Glasses (like Microsoft HoloLens, Magic Leap, or XREAL) do have a display and overlay graphics.

#Examples of things that are NOT AR glasses:

· Prescription eyeglasses
· Sunglasses
· Reading glasses
· Blue light blocking glasses

#Examples of AR glasses:

· Microsoft HoloLens 2
· Magic Leap 2
· XREAL Air (requires a phone/PC for processing)
· Vuzix Shield