In this mind-bending puzzle, there are three numbers that are visible - 21, 22, and 23. But there is a third number in this ...

People have been left scratching their heads over a mesmerizing image appearing to change right in front of their eyes ... when we see this color saturation optical illusion." ...

While most of the time our brain processes what our eyes see, there are instances when this powerful organ fails us. We selected a few optical illusions to test your perception of reality.

Test your eyesight with a challenging optical illusion that requires you to spot the real owl among soft toys in just 7 seconds. Focus on subtle differences in texture and eye color to ...

The peripheral drift illusion causes us to perceive motion in a still image. A new study shows that the mechanism of this illusion relies on changes in pupil size.

Optical illusions are the latest craze among netizens. They are created in the form of pictures that trick the human mind and are regarded as one of the simplest tests to test an individual's ...

Optical illusions ... tricking our eyes and brains. The challenge involves identifying 7 subtly different individuals in a group of identical people. Key details such as clothing color, posture ...

A video showing an unexpected optical illusion captured in a parking lot ... and some neurons change course by sending information back to the first stage of processing," the paper said.

Optical illusions offer a fascinating challenge ... Only those with truly eagle eyes can pinpoint the needle in such a brief timeframe. If you can identify the needle under this intense time ...