Fascinating Optical Illusion Disguises 12 Black Dots Right in Front of You

Can you see them?
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First there was the dress that sent the internet crazy and now there's this optical illusion and whilst it won't divide opinions around the world and stir up such a fuss, it's still causing everyones head to hurt.

The photo you see below is known as Ninio’s extinction illusion and shows a grid of 12 black dots all spaced out over a grey pattern, however you can't see all 12 black dots at once.

The illusion is a variation of the Hermann grid illusion and takes advantage of the lateral inhibition in your retinas or in other words, the light receptors in your eyes doing a really bad job at deciphering between two colours that are right next to each other. The end result is a grid of 12 black dots that you'll never see at once.

12 black dot optical illusion.jpg

h/t