For nearly 500 years, people have been gazing at Leonardo da Vinci's portrait of the Mona Lisa with a sense of bafflement. First she is smiling. Then the smile fades. A moment later the smile returns ...

Rapid, unconscious eye movements explain a famous optical illusion in which a still image appears to move. When the eye movements, called microsaccades, were suppressed, test subjects reported that ...

A team of Israeli scientists may have discovered why your eyes flicker when you sleep. Everyone’s heard of rapid eye movement (REM) sleep, which often occurs during dreaming. It’s previously been ...

Nystagmus in dogs refers to the flickering or twitching of the eyes. In most cases, flickering eye movements are entirely normal. But they can become concerning if the movements happen when your dog's ...

Your body may be still, but as you dream, your eyes can flicker manically. The rapid eye movement stage of sleep is when we have our most vivid dreams – but do our flickering eyes actually “see” ...

Nowadays I see monitors go up to 200Hz. Is this the limit of what a human eye can detect? or is it still possible to see flicker?<BR><BR>I stare at this monitor at work for 8 hours a day at 85Hz and ...