Some visual scientists think this is due to fixation jitter: eye movements that give the illusion that objects near what you’re focusing on are moving. Which of the two circles in the centre is ...

The bar was S-shaped, which allowed the hoop to pass in a figure-of-eight, giving the illusion that it’s moving in a straight line when looked at from the audience. The part most people don’t ...

Visual illusions of motion are a major source of interest in the vision research community. Explaining how a still image can produce an illusory perception of motion is important for a more ...