Using a computer model of the retina, researchers have been able to trace the cause of the expanding hole illusion ...

In this optical illusion picture, two patients are hiding in plain sight. Can you spot them in 9 seconds? Test the sharpness of your eyes now!

These optical illusions are intriguing visual puzzles that challenge the way the brain processes images. Sometimes they trick ...

Challenge your brain with this optical illusion IQ test online! Spot the hidden pencil in just 5 seconds in this tricky ...

Optical illusions are captivating images that trick our brains, playing with our perception of color, light, and patterns. A ...

Can you spot the hidden number? This optical illusion features a grid of identical circles with 96 and 69, but one lone circle has the number 99. Optical illusions like this challenge your observation ...

This optical illusion is tricky because the letters aren't immediately obvious despite the short amount of time you have to find them. The lack of objects to inspect also makes it difficult.

PUZZLE solvers have been challenged to solve this unique optical illusion that has baffled the minds of many. Only a true genius with a high IQ and a perfect 20/20 vision can crack this challenge ...