When it comes to lens options, "many people worry that they might be giving the 'wrong' answer," the optometrist told ...

Today’s optical illusion is challenging people to find a hidden "25" among a grid of "22" and "55." This brain teaser plays on pattern recognition, making it difficult to spot the odd number. So are ...

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 ...