If you've played a video game before (chances are high if you're reading this book), navigating with W, A, S, and D might seem familiar. It's a proven input method that has been a solid common denominator for many keyboard-operated games. However, VR enables us to implement input methods that haven't been possible before now, for instance, using your eyes.
One of the simplest ways that gaze is used in virtual reality experiences is to teleport or jump from point to point. This is sometimes seen as more ideal than the movement we implemented in the last section since any kind of smooth locomotion without a response from our inner ear can make us feel nauseated.
Gaze-based teleporting circumvents this issue by instantaneously moving the player to whatever point they were looking at when a key or button was pressed. Because there's no perceived inertia, there is no eye/ear disconnect; the player is stationary throughout the whole process.