Follow the ball with your eyes while its speed changes without warning.
This is eyes-only practice: there is no score, just a session summary that counts toward your streak. There is no webcam or eye tracker here.
It does not diagnose anything, and it does not claim to improve anything beyond performance on this task. Reported times include display and input latency from your own hardware.
Stop if you feel dizzy, nauseous or strained.
Same as Smooth Pursuit, eyes only, but the ball speeds up and slows down without warning. Stay with it.
Eye-tracking practice (session summary, no score). Higher is better. Each difficulty (Easy, Normal, Hard) keeps its own personal best, and custom settings are saved but not ranked, so your bests stay comparable.
Eyes only: keep your head still and follow the ball with your eyes. Practice can make following smoother and more accurate; the top speed your eyes can follow is set by the brainstem and doesn't change. Not medical advice. Stop if you feel dizzy, nauseous or strained.
Your eyes move in a few distinct ways. Smooth pursuit keeps a moving thing in focus. Saccades are the quick jumps between points. Fixation is holding still on one point while the world moves around it.
Practice can change how accurately you land, how quickly you start a movement and how well you hold back one you did not want. The top speed of these movements is set by the brainstem and does not rise with practice.
Eye exercises do not improve eyesight or change a glasses prescription. If your vision changes, see an optometrist.
