Brain exercise
Watch Something Vanish While You Stare Right at It
Three bright yellow dots simply stop existing for you. They never leave the screen.
This one is the most startling demonstration on the site, and it takes about twenty seconds. Keep your eyes on the center dot and pay attention to the yellow dots without actually looking at them.
What just happened
Why this one unsettles people
- The moving field did the workA steadily moving background suppresses the steady foreground. Your visual system treats the constant thing as less worth reporting than the changing one.
- They vanished completelyNot dimmed, not blurred. Gone, with the background filled in seamlessly where they were, exactly as it does across your blind spot.
- They came back instantlyA blink or a small eye movement restores them at once, because it breaks the conditions that produced the suppression.
Afterimages and fading feel like tired eyes. This feels like your brain editing reality while you watch, which is closer to what is actually happening in all of the demonstrations here.
The effect was formally described in 2001, which is remarkably recent for something this striking, and there is still active disagreement about the mechanism.
A quick note. Objects disappearing under these specific conditions is normal and reverses instantly. Parts of your vision going missing during ordinary daily life is a different thing entirely and worth raising with an eye-care professional promptly.
Science vs hype
What this does not mean
What you may have seen. Clips of this presented as a test of focus, of visual processing speed, or as revealing something unusual about people who see it strongly.
What this activity actually involves. A well-documented perceptual effect produced by a moving field suppressing static targets. This demonstration produces it once.
Where the evidence stops. How strongly or quickly the dots vanish depends on your screen, your distance and how still you hold your gaze. There is no evidence it indicates anything about attention or brain health, and it is not a screening tool of any kind.
Who Can Use This One
- Vision is required and there is no audio equivalent.
- The background rotates slowly and steadily. Nothing flashes or strobes, but if smooth motion is uncomfortable for you, this is one to skip and read instead.
- Holding your gaze still is the task, so it is harder with any condition affecting steady fixation.
- Nothing is recorded. No account, no score stored, nothing sent anywhere.
Your Brain Edits, and It Does Not Ask
You just watched your own visual system remove something and tell you nothing was missing. That is worth knowing about, and most people go their whole lives without seeing it happen.
The same editing runs underneath how people judge their own concentration and memory. It does not announce itself there either. That is the reason we measure rather than ask, and it is why a careful evaluation beats a careful conversation about symptoms.
That conversation is free if you want to find out what is actually going on rather than what it feels like.
If you would rather read first, our conditions page sets out what neurofeedback is used for and how strong the evidence is for each, and our research page covers what the studies actually found, including the ones that came out negative.
A free conversation with a psychologist. No intake form, no obligation, and we will tell you plainly when the answer is that you do not need us.
These activities are demonstrations of how perception, attention, memory and movement work. They are not tests, screenings or diagnostic tools, and no result here says anything about whether you have a medical or psychological condition. Nothing on this page is medical advice or a substitute for evaluation by a qualified professional. Last reviewed September 2026.