Keep centre fixation and catch signals at the edges.
This task records detection rate on a fixed, repeatable version of the task. Your result is comparable to your own previous attempts on the same device.
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.
Keep your cursor inside the centre ring and your eyes on the cross. A dot flashes briefly near or far from the centre. Press Space, click or tap as soon as you see it. Some trials show nothing; don't respond to those.
Detection rate. 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.
A screen covers only part of your field of view, and sitting closer moves the same dot further out. Compare results at the same distance from the screen.
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.
