While new optical illusions go viral all the time, here are some of the most famous illusions that have kept us scratching our heads for years.

From The Dress to legless women, the internet is filled with optical illusions that are both accidental and intentional.

Optical illusion personality tests are interesting brain teasers that trick the brain and eyes into believing what a person ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and were seen in caves. Nowadays they are found all over the place – on screens, in books and even in ...

Optical illusion personality tests are interesting images with multiple objects layered into one another that trick the brain ...

A viral photo appears to be a person and two dogs in the snow. But it's actually three dogs. Can you spot the difference?

Optical illusions are commonly used to learn about the human psyche. Some turn simple changes into unrecognizable faces, make people look alien-like, cause you to hallucinate, and even determine how ...

Can you rat out his hiding spot? If you can spot the mouse in this optical illusion in less than a minute, you may be a record holder. Created by Hungarian author-artist Gergely Dudás, the ...

An optical illusion and its hidden images can reveal lots about your personality — depending on what image you see first. So, do you see a dark-haired woman sitting on the ground, or a face with a ...

Laeng et al., Frontiers in Human Neuroscience // CC BY 4.0 The science behind optical illusions has been thoroughly studied, but researchers are still finding new ways to trick our eyes. This image ...

Even if you have perfect vision, you can't always trust your eyes. The image above created by Lenstore illustrates this. The circle on the left appears to be a lighter shade of blue than the circle on ...

Optical illusions play on the brain's biases, tricking it into perceiving images differently than how they really are. And now, in mice, scientists have harnessed an optical illusion to reveal hidden ...