naturally that your brain may initially interpret them as nothing more than ordinary parts of the landscape.
That is what makes this optical illusion so fascinating.
Some people claim they can identify the hidden man almost immediately, while others spend several minutes searching before the face finally becomes visible.
And surprisingly, the difficulty has very little to do with eyesight.
Instead, it has more to do with the way the human brain processes visual information.
When we look at an image, our minds naturally concentrate on the objects that appear
