Optical illusions test cognitive skills by challenging perception and observation. Finding four hidden faces in a picture within 8 seconds signifies elite observational abilities. Techniques like ...

One of the most famous optical illusions involves a staircase that seems to be going both up and down at the same time. See today's front and back pages, download the newspaper, order back issues ...

A man is seen taking pictures ... Thousands of adults have been scratching their heads over the image, trying to find the ...

Optical illusions are powerful tools that trick our ... Studies show that being able to spot details in these optical illusion pictures indicates strong observational skills and quick processing ...

Similar to physiological, cognitive, and physical illusions, there are several optical illusions. Based on what we perceive, ...