GazeBall

Eye tracking offers opportunities to extend conventional game control with gaze input for multimodal game interaction. Gaze, however, has been found challenging to use as it requires re-calibration over time and for different users, in order to maintain an accurate input.

We created GazeBall, a retro game inspired on the arcade game BreakOut, to leverage the natural gaze behavior that users exhibit during gameplay for implicit and continuous re-calibration. In GazeBall we continually calibrate the players’ gaze based on their natural ocular pursuit of the game’s ball movement.

Re-calibration enables the extension of the game with a gaze-based ‘power-up’. In the evaluation of GazeBall, we show that our approach is effective in maintaining highly accurate gaze input over time, while re-calibration remains transparent to the player.