The internet is blowing a collective gasket over a triple-tiered eye test in which objects seem to disappear and appear right before the viewer's eyes. Twitter It’s the multiheaded hydra of optical ...

Your eyes are about to lie to you. Most people think they see every detail in front of them, but your brain often takes shortcuts to save energy. Today, we are testing your ability to break through ...

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Dog pics might seem self-explanatory — however, internet users have been howling over a recent photo of a canine in an unusual position. Viewers struggled to figure out which end is “pup.” First ...

Medical imaging experts are adept at solving common optical illusions, according to new research. The research is the first to show that people can be trained to do better at solving visual illusions, ...

How optical illusions work has been long-debated among scientists and philosophers, who wonder whether these illusions stem from neural processing in the eye or involve higher-level cognitive ...

(CNN) — Over two centuries ago, physiologist Jan Evangelista Purkyně noticed that red flowers looked bright carmine during sunny days but appeared to change to a deep muted hue come nighttime. The ...

Lake Sørvágsvatn in the Faroe Islands is a breathtaking natural wonder that appears to hover above the sea, thanks to a ...

In this Ebbinghaus illusion of relative size perception, the orange circle on the left looks bigger than the one on the right - but it is actually 10 per cent smaller. In a new study, medical imaging ...