Optical Illusion: Eight Images That Fool Your Eyes
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What is Optical Illusion?
Eight different optical illusions gathered in one place. In each of them the shapes on screen seem to move, change color or curve. Not one of them actually does; your brain is playing a trick on you.
How to play
Pick an illusion from the menu and follow the instruction on screen: some ask you to stare at the dot in the middle, others want you to move the mouse over the image. When the shapes look like they are shifting, back away from the screen a little and see the difference. After trying one, return to the list and open the next. Nothing is timed and nothing can be lost.
Controls
| Key | Action |
|---|---|
| Left click | Choose an illusion or go back to the list |
| Mouse move | Trigger the effect on some of the images |
| Touch | Tap an image on a phone to open it |
Tips
- Standing half a meter back from the screen makes most of these illusions much stronger.
- Keep your eyes on the center dot without blinking, because that is when the sense of movement starts.
- Hold a ruler or the edge of a sheet of paper against the screen to check whether the lines really do curve.
Frequently asked questions
Can this hurt my eyes?
The images are harmless, though staring for a long time is tiring, so look into the distance now and then.
Is it suitable for young children?
It is. Nothing here is frightening, and it tends to spark the question of how the trick works.