Optical illusion challenges you to spot 16 circles - and reveals how the brain works
- Posted on June 16, 2025
- By The Daily Star
- 1 Views
Optical illusion challenges you to spot 16 circles - and reveals how the brain works
An optical illusion has been doing the rounds on social media, with many people left scratching their heads as they struggle to spot the 16 circles hiding in the image
