Optical illusions test visual perception and cognitive focus, making them fun, shareable, and a great way to challenge the brain. Most people take between 10–30 seconds, but only a few can spot “Polls ...

This optical illusion is a real IQ and perception test! All you see at first is a pattern of words that are repeated. A secret task, however, is concealed among them: locate the word "BINGO" in five ...