Don't worry, this isn't a driving theory test - but your mind will still be left boggled after trying to work it out.

This optical illusion will leave you questioning everything you know, as you struggle to work out what's going on. The illusion, named A Turn in the Road, was developed by researchers at Rice University in Texas, and came third in the Best Illusion of the Year Contest back in 2024.

Created by doctoral student Kimberley D. Orsten and psychology professor James R. Pomerantz, it is designed to confuse your mind - and only those with high IQ can work it out. In front of you you'll see three roads - you might think all three of them are different, but apparently only one is - can you work out which one it is?

It's not obvious at first (
Image:
Kimberley Orsten, James Pemerantz / The Illusion Contest)

Kimberley explained how the illusion works: "When we look at two pictures that are physically the same, they usually look the same. When they are different, they look different. Our illusions show the opposite: two images that are different but look the same - those are called 'metamers'; - and two images that are identical but look different – we call those 'anti-metamers.'"

The illusion you see in front of you mixes two images which are 'metamers', meaning they are identical but look different to us, due to the way our brains can misinterpret information, and 'anti-metamers', which are different but look the same to us. It's "an illusion we call 'false pop out'," according to Kimberley.

Those with great observational skills will be able to tell which road is actually different from the others - but it will take a lot of concentration. So try to banish all other thoughts from your mind and look at the image, before trying to decide which road is the odd one out.

The way the roads are lined up, they might all look different, but two are actually identical. This is because of the way they are lined up, and the answer becomes much clearer when you move them. You can see how in the video below.

The road which is different is actually the one in the middle. When the road on the left is moved to the right side, you can see it's identical to the one on the right.

Many were blown away by the illusion, with one person writing: "When it slides through, it's pretty obvious which one is the same. Otherwise, in the beginning the one on the right looks more different than the one in the middle."

Someone else simply wrote: "Mindblown," however, others with high IQ didn't need the video in order to see which one was different. One person wrote: "This illusion just can't work for me. I think I have good perception."

Did you manage to work it out? Let us know in the comment section below.