Because the lines aren't in the middle, they look like they bend and waver.
people see the grey-framed boxes as being stacked vertically by colour, while others see something completely different.
When you look at them more closely, you can see that they are in rows across the top.But the story doesn't end there.
The optical illusion was posted on Reddit along with the even more confusing question, "Do you see diagonal lines?"
People have been fooled by optical illusions before, and it's likely that they will continue to do so in the future.
Illusions are very popular on the internet, and they are a great way to have fun and keep your brain active.
Look at this example to see what I mean.
It might look like a line of legs, but if you look at the positive or negative space first, you can learn a lot about how well you communicate.