We love a nice optical illusion (if you hadn't noticed), and happily the internet is full of people creating little gems to trick our eyes. Anyone wanting to create their own won't want to miss this ...

At first, this might look like a simple image. But counting the number of hidden 8s in it is far from easy. What seems like a straightforward challenge quickly becomes more puzzling the longer you ...

People with locked-in syndrome could use their eyes to mimic handwriting or drawing thanks to new gaze-tracking software. You might think you control your eyes, but really they are constantly making ...