India, Aug. 2 -- The optical illusion challenge for the day is here, and it has left many scratching their heads on the internet. The task is simple: players have been asked to spot the third face in the viral image, which features two girls. But even the pro players are finding it extremely hard to crack this mind-boggling puzzle.

Such fun games are a great way to put your observational skills to the test and make people aware of their visual abilities. Using various kinds of patterns and colors, optical illusions play tricks with the brain, forcing us to look beyond the obvious to search for answers. At times, they make people perceive things that could be totally different from the actual reality.

For many people, solving such puzzle...