Smart glasses use sonar to work out where you’re looking

Gaze-tracking devices normally rely on cameras, but a new system uses reflected sound to track where someone is looking based on the shape of their eyeballs

​Gaze-tracking devices normally rely on cameras, but a new system uses reflected sound to track where someone is looking based on the shape of their eyeballs Gaze-tracking devices normally rely on cameras, but a new system uses reflected sound to track where someone is looking based on the shape of their eyeballs