This optical illusion asks viewers to stare at a black X inside a blue circle without blinking. The idea is to tire out the ...

This illusion asks viewers to stare at a blue eye in the center of a colored image. After a short countdown, the image ...

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.

The optical illusion seen above makes the viewer feel as if they are falling into an expanding hole – and now we have a good explanation for why this happens. Optical tricks can be caused by different ...

Perception researchers have long known about the structural and functional features that differentiate our central vision from our peripheral vision. The central (or foveal) region of our retinas are ...

Optical illusions occur naturally in different habitats and conditions across the world. Cloud formations can sometimes make it seem like there's an ocean or a UFO in the sky. Whether it is salt flats ...

New York — At the Museum of Illusions in New York City, around every corner is a wonder for the eyes. There's a vase that's a face, art that moves with you, and a room that seems to go on forever.

Sometimes your eyes can be a little too quick to judge. The mind loves to make sense of what it sees, even when the picture in front of you isn't what it seems. A trick of the light, a lucky angle, or ...