This optical illusion in knows as Hermann grid illusion reported by Ludimar Hermann in 1870.
The grid can be shown here:
The game is to find the real blinked dots against the illusions.
On the beginning it looks easy, but it gets more and more difficult.
For more info: removed external links.
The grid can be shown here:
The game is to find the real blinked dots against the illusions.
On the beginning it looks easy, but it gets more and more difficult.
For more info: removed external links.
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