New Delhi, July 17 -- Optical illusions are becoming all the rage on the internet and this seemingly simple one has taken social media by storm. The puzzle has left many scratching their heads as they try to find a single word hidden in plain sight.

The image presents a grid filled with the word 'form' which is put in identical red blocks. However, somewhere in the ocean of repetition lies one sly variation.

At first glance, the optical illusion appeared as nothing more than a neat matrix of identical words. But look closer, and you will notice something is off. The brain teaser works by exploiting the human mind's tendency for auto-correct: our brains are wired to anticipate and gloss over small anomalies, especially when the surroundi...