The optical illusion is a phenomenon in which a simple image leaves a deceptive impression in your mind. You must have seen numerous brain-teasing images of an optical illusion on the internet.

Now there’s another optical illusion making rounds on the internet. This visual of optical illusion was shared by a game developer Will Kerslake on Twitter. I bet you won’t be able to see all the twelve dots together in this picture.

The puzzle was uploaded to Twitter and has now been shared more than 35,000 times. “There are twelve black dots at the intersections in this image,” wrote games developer Will Kerslake.

There are twelve black dots at the intersections in this image. Your brain won’t let you see them all at once. pic.twitter.com/ig6P980LOT

— Will Kerslake (@wkerslake) September 11, 2016

French scientist Jacques Ninio said the illusion has to do with humans having sketchy peripheral vision. It takes time and a lot of focus to be able to see almost all the dots together. If you try to look hard enough to see all 12 dots, you’ll probably end up with a little headache. And anyone who tells you they can see ALL 12 at the same time is probably definitely most certainly trolling you and should not be trusted.

Many were able to see three or four at a time. What about you ? Do share your count in the comment session below.