Ready to challenge your brain and your eyes at the same time? This optical illusion and IQ-style test is designed to check ...

Critical flicker fusion (CFF), a measure of visual processing speed, predicts executive function in younger and older adults and may be helpful in predicting decline in executive function, say ...

Optical illusions with hidden images are real-time tests of your observation power. Test your visual processing skills with ...

Your brain is a fascinating machine, capable of processing vast amounts of information within seconds. But how good is it at detecting hidden details in complex environments? Optical illusions like ...