Uploaded May 2012 | Updated September 2026, 2 weeks ago
The blinking lines appear to be tilted slightly. But when they are presented continuously, it is easy to see that both lines are in fact perfectly horizontal/ vertical. This illusion is a variation on the Flash Grab effect by Patrick Cavanagh and Stuart Anstis. For an explanation, see http://www.cogsci.nl/illusions/flashing-grabbing-and-dancing-lines
The blinking lines appear to be tilted slightly. But when they are presented continuously, it is easy to see that both lines are in fact perfectly horizontal/ vertical. This illusion is a variation on the Flash Grab effect by Patrick Cavanagh and Stuart Anstis. For an explanation, see http://www.cogsci.nl/illusions/flashing-grabbing-and-dancing-lines
