Have you ever taken an IQ test? It’s one of those tests that can stick with us for a lifetime and shape us in many ways. But did you know that determining our IQ can take on different forms? For example, there’s a sketch that professors from Flinders University in Australia devised, and it’s quite intriguing.

At first glance, most people see an elderly woman in the sketch. But if you look closer, something else may start to appear. Can you see it?

In case you’re having trouble, let me reveal the secret. Hidden within the picture of the old woman is a picture of a young woman. Once you see it, you can’t un-see it.

The professors conducted a test where they showed this picture to many people. Interestingly, they noticed that age played a role in what people saw. Those who were under the age of 32 were more likely to see the young lady first, while those over the age of 32 were more likely to notice the elderly woman first.

If you’re struggling to see the younger woman, here’s a hint to guide you. The younger lady’s profile is in the left cheek of the older woman’s picture. And the nose of the older woman actually serves as the chin of the younger woman.

It’s fascinating how our perspective can change based on our age and what we’re primed to see. So go ahead, take another look at the sketch. Once you spot both images, it’s hard to see just one. Enjoy this moment of wonder and discovery!