Optical illusions and brain teasers trick the brain into believing what a person sees first, despite many other things that are also there in a particular image.
These brain teasers become a test of patience, focus, and a test of how keen an observer you are!
One such brain teaser is making rounds is a woodland scene packed with foxes, and somewhere in that sea of brown-eyed creatures, one sneaky fox with blue eyes is hiding in plain sight.
It sounds simple enough, but plenty of sharp-eyed puzzlers have found themselves stuck, scanning the same corner of the image over and over.
So, before you scroll further and check the answer, take a moment, set a timer, and see if you can actually beat the clock.
So, here, take the test!Photos: The Sun