Optical illusion with lines is 'best' puzzle lovers have seen in 'long time'
![Optical illusion with lines is 'best' puzzle lovers have seen in 'long time'](https://i2-prod.mirror.co.uk/incoming/article31657185.ece/ALTERNATES/s615/1_Confused-young-woman-looking-on-laptop-feels-bewildered-by-reading-online-news.jpg)
Optical illusions are a great way to keep your mind sharp and get competitive with family and friends - and this one has been labelled 'best' people have seen in a 'long time'