Only the top 1% of geniuses can find the hidden dog in this rocky optical illusion in just five seconds – can you?

WANT to put your mind to the test? This tricky optical illusion might just leave you scratching your head.

There are plenty of different types of optical illusions and brain teasers out there, some force us to see things from a new perspective and others are like a workout for your brain.

To solve this optical illusion all you have to do is find the hidden dog in the image – but be warned, it’s not as easy as it might look.