How the exercise works
Keep the center marker as a visual reference, notice a target, then answer by direction or identity. The target is never presented with rapid flashing.
Peripheral Vision Training with a Center Reference
Use a central reference while a brief target appears in one of eight screen regions. Answer its position, identify its character, or try a number-grid variation around the same fixed point. You can slow the exposure, use an untimed response, raise contrast, pause, and choose a comfortable layout distance. The browser has no camera or eye tracker, so gaze cannot be verified.
Center-gaze and edge-target practice
The browser cannot verify central gaze or measure visual-field angles. Direction results are not evidence of a visual-field defect. Persistent visual problems should be assessed by a qualified professional.
Esc exits full screen
This is a general visual-search practice tool. It does not measure your visual field, diagnose attention, or replace professional eye or health advice.
Why the center point is only a reference
The browser has no camera, eye tracker, or medical instrument and cannot verify where you look. The point is simply a consistent on-screen anchor.
Position awareness versus visual-field testing
Near, Medium, and Far describe CSS layout distance, not visual angles. Direction counts are practice records and cannot identify a visual-field defect.
Choosing comfortable settings
Begin with 1000 ms, Standard contrast, and Near or Medium distance. Extend exposure or use untimed response whenever the brief display is uncomfortable.
Reading the directional result
The summary shows correct and incorrect answers per region. A lower count in one direction can reflect randomness, screen layout, input, or distraction and is not a diagnosis.
Screen and device limitations
A viewport edge is not a calibrated visual angle. Screen size, browser chrome, zoom, posture, and viewing distance all change target placement.
When to stop
Pause or stop for eye strain, headache, dizziness, or discomfort. Persistent visual problems should be assessed by a qualified professional.
FAQ
Does this page track my eyes?
No. It never requests camera permission and cannot confirm central fixation.
Is Far a visual-field angle?
No. It is only a farther CSS position within the current browser viewport.
What do directional results mean?
They summarize answers in this practice session only and must not be read as a clinical finding.