New Delhi, June 21 -- Optical illusions are a fun and captivating way to trick our eyes. By definition, an optical illusion is a deceptive image that misleads our visual perception.

These visual puzzles help uncover hidden limitations of our perceptual system in ways that ordinary vision cannot.

The best example to understand how optical illusions trick our minds and fill in the gaps is through the Brown & Bornoff (2017): "It deosn't mttaer in what order the ltteers in a word are, the only iprmoetnt thing is that the frist and lsat ltteer be at the rghit pclae."

Could you read the entire sentence?

Now that you know how optical illusions work, let's take an IQ challenge.

In today's IQ test challenge, you to find the '257' which is hid...