Substitution · gaze shift
Eye–head between targets
Two targets on screen. Eyes jump first to the lit target, then the head turns to align. Seated at a desk. This is not a canalith maneuver.
Setup
- Sit upright. Shoulders relaxed.
- When a target lights: eyes first (fast saccade), then turn the head to face it.
- Hold briefly, then the other side lights — repeat.
Space pause · F fullscreen · Esc stop
Nausea ≤5/10. Slow down or stop if you go higher. Don’t train intoxicated.