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How optical illusions work has been long-debated among scientists and philosophers, who wonder whether these illusions stem from neural processing in the eye or involve higher-level cognitive ...

You look at an image of a black circle on a grid of circular dots. It resembles a hole burned into a piece of white mesh material, although it’s actually a flat, stationary image on a screen or piece ...

Everyone loves an optical illusion — even if they leave us completely stumped — and they're all around us in the natural world. From an underwater waterfall in the Indian Ocean to a surrealist scene ...

Professor Michael Bach works in the research department at the University Eye Hospital in Freiburg. Through vision-related pathologies, he has taken a very close look at how the eye works and the ...

Viewers have been left stumped trying to determine how many shapes are in this photo. This optical illusion creates a series of triangles, squares and lines, but most viewers are shocked to learn that ...