Reddit users left scratching their heads as optical illusion shows 'curved line'

dailystar.co.uk:

optical illusion?The thing with illusions is that they're made to baffle the brain and you might not fully understand it.But that's okay considering everyone's going to have a different perception of the image.So if you think you've got enough patience, let's see if you can solve this tricky picture?A Reddit user left fans totally baffled when they shared an image showing a "curved line".However, when you start looking at the photo, you'll find that everything might start appearing curved to you.The user wrote: "Thanks, I hate optical illusions," in the image which said: "Go ahead, find the curved line."In the picture, it shows green lines to form a grid on a grey background.Other Reddit users were equally confused by the photo as it racked.