Visual brain teasers are not only a fun way to pass the time, but they also stimulate your brain and can be beneficial to your intelligence. These “optical illusions” demonstrate that not everything you see is true! According to Susana Martinez-Conde, director of the visual neuroscience laboratory at Barrow Neurological Institute in Phoenix, Arizona, they are important tools in visual research as they help us understand how visual processing works in both normal and diseased brains.

Let’s take a closer look at a particular brain teaser in the form of a frog image. At first glance, it appears to be just a photograph of a frog. But is there more to it than meets the eye? Take your time and observe closely. Patience is key in recognizing that this frog image is actually of a different species! Though this image is not an optical illusion in the strict sense, it has more to do with how your brain functions and perceives images rather than the optics in your eyes.

Mark Changizi, a neurobiologist and assistant professor of cognitive science at Rensselaer Polytechnic Institute, explains that the brain is constantly constructing things, which helps us survive. Some of these structures could be made up. So, what do you see in the image? Do you simply see a frog sitting on the ground or perhaps at the edge of a pond?

If you’re still unable to spot the hidden animal in this frog image, don’t be alarmed! It’s not that simple. It’s entirely understandable if you didn’t notice the other animal at first glance. Even though the horse is in clear sight, I struggled to see it initially as well. But fear not, the big reveal is here!

Behold, the horse!

ok at the frog photo, but this time, the horse has been emphasized. If you still can’t see the horse, the second image will make you exclaim, “Oh! There it is!” Just flip the image around, and voila! You’ll see the horse’s head.