Finding hidden images in optical illusions is an effective mental exercise that challenges your cognitive functions while ...

This optical illusion challenges you to find the hidden strawberry among watermelons. This is a real-time test of your ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images ...

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 ...

Artists and scientists have been creating optical illusions for centuries. Here are 35 mind-bending examples that prove you can't always trust what your eyes are telling you. When you purchase through ...