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 dad who spotted something "strange" in his son's eye was devastated to learn it was caused by a brain tumour. Callum Ewing was four years old and watching spooky cartoon classic Scooby Doo when his ...

WE take them for granted, one of our most important organs, often not appreciating them until we start to notice our vision going. But, while changes to your eyesight are inevitable with age, it's not ...

Four-year-old Rome Hill was watching TV at home when his parents noticed a flicker in his right eye. It was moving up and down, so they immediately booked a test at the opticians. Little did they know ...

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 ...

Flicker, or a flashing effect, occurs as the LED backlight controller of a monitor adjusts to the changes in brightness level. A regular monitor backlight can cause fast backlight flickering at 200Hz ...

Before the tragic incident, Callum’s parents thought he was a moody toddler who got frustrated while playing with certain toys Salford University student Callum Ewing (pictured when he was a toddoler) ...