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

Looking for the best optical illusions with hidden images? Test your intelligence with this optical illusion IQ test online!

Can You Spot the Hidden Cat in 5 Seconds? Optical illusions with hidden images are a fascinating way to test your IQ, ...

Test your detective skills with a challenging optical illusion! Spot the werewolf hidden among three doctors in just 11 ...

Optical illusions like the hidden cactus challenge can test and enhance observation skills, cognitive flexibility, and ...

Optical illusions push your brain to think creatively, and this one is a tough test. Spotting two patients hidden in an image ...

From the mad snap of the sitting women that always has us baffled, a 'second horse' only people with a high IQ can spot, and ...

Viewers were mesmerized by the striking scene in the viral clip, with one saying, "That's a view into an alternate reality." ...

"Top 10s delivers expertly crafted videos featuring in-depth analysis, exclusive visuals, and engaging infographics on a ...

HERE is another fun brain teaser to test your eyesight and powers of logic. Everyone can see the ice skater on the rink – but ...