A baffling optical illusion has gone viral on social media, leaving viewers divided over the hidden number within a swirling grey and black pattern. The image, shared on X (formerly Twitter) by user @benonwine, challenges observers to spot a number camouflaged in the design. However, people are reporting vastly different results, from a single digit to a longer sequence.
This type of illusion, known as a physiological illusion, works by overstimulating the brain with excessive light, shape, or colour. The circular pattern features sharp angles and swirls, with the hidden number appearing in grey. Some users claimed to see only a '2', while others spotted '528' or longer combinations. One person with vision loss noted they could only see the central digit.
Experts suggest that the differing answers may relate to contrast sensitivity—the ability to distinguish an object from its background. This skill is crucial in low-light or high-glare situations, such as driving. The illusion exploits this by placing the number on a different visual plane, making it harder to discern.
The correct answer is 3452839. For those struggling, a tip is to lay the phone flat on a surface or angle the screen to reduce glare, which can help reveal the full sequence. This illusion not only entertains but also highlights how our brains interpret reality, often with a slight delay of about 100 milliseconds.
