Optical illusions are a great way to test your ability to experience the world as it truly is.

They tend to boggle the minds of many people, and this new image is driving the collective internet insane.

It will undoubtedly make you question your own perception. The image in question has been viewed more than 1.5 million times on Reddit, and it has so many comments that it is clear people can’t agree on the illusion.

The illusion is quite simple. There is a grid of intersecting lines with dots at certain intersections, and the goal is to count the dots. That may seem easy enough on paper, but it is quite difficult due to the visual nature of the grid and the dots.

The human eye focuses on small points in a different way than it picks up peripheral sight, which means those dots disappear from view when you don’t look directly at them on the grid.

In fact, the more your eyes move across the image, the fewer dots you can see.

This isn't a gif. Your eyes just can't see all 12 back dots at the same time.

Most people can’t accurately count the number of dots because they can’t see them all at once.

The receptors in the eye that focus on areas that small are surrounded by other cells that don’t work at that same resolution, so when you move your focus away from one of the dots, the dot disappears behind your own eye’s lack of ability to discern peripheral data. In case you can’t count the dots yourself, there are a total of twelve hiding in the image.