An optical illusion shared on Facebook challenged users to count scattered dots. (Facebook/Minion Quotes) (Also read: Optical illusion: Only super-focused eyes can spot the hidden feather in this ...

Optical illusions play tricks on your brain and can make you see things that aren't really there, from static images swirling around the page to images that stay with you even after you look away.

Among dozens of dice scattered across a vibrant purple background ... you may find the odd one out in time. This optical ...