India, Sept. 6 -- A new optical illusion is making the rounds online, and it may leave even pro players confused. The challenge looks simple enough: find the cat in a cozy living room drawing. The catch is that players need to find the animal in less than 10 seconds.

At first glance, nothing looks off. The picture is of a standard living room setup with a sofa, a bookshelf, a few plants, and a coffee table. But somewhere in there, a cat is tucked away. The placement and coloring make it difficult to pick out unless you really slow down and scan every corner.

The reason images like this go viral is simple. They mess with how the brain reads patterns and familiar objects. A cat hiding against the right backdrop does not register right awa...