If you focus just a little harder, you’ll soon realise something hidden within the lines that isn’t immediately obvious - but ...

you'll find the word "delay" printed in bold black letters multiple times. But there's a catch among these repetitions is one word that's not quite the same. Can you spot it in under ten seconds?

An optical illusion eye test challenges viewers to find the hidden letter "A" among a grid of 4s and 0s. This viral brain ...