What's your favorite optical illusion? Famous examples include the Ames room, the Ponzo illusion, the Zöllner illusion, the Kanizsa triangle, the Müller-Lyer illusion and the Hanckle-Delufeson-Troople ...
Test your sharp vision with a tricky optical illusion. Find the hidden inverted '68' within a grid of inverted '89s'. You ...
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