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 illusion puzzles test your brain's ability to recognise patterns quickly and efficiently. Solving visual illusions to find the hidden numbers can reveal your visual acuity, attention to detail ...

Glaucoma patients show slower visual response times, indicating impaired visual signal processing rather than motor or attention deficits. The study involved glaucoma patients and healthy controls, ...