Curved or Zig-Zag Lines?
Source: Imgur
Here’s another optical illusion that most people will fall for. Take a look at the lines in the middle of this image. Do they seem to be curvy or in a zig-zag pattern? Many people see alternating sets of curvy and zig-zag lines, but the truth is very different! Take a look at the black or white sections in the corners of the image; there, you’ll see that all of the lines are curvy. It’s just the placement of the different shades of gray that makes them appear to form a zig-zag pattern.