The café wall illusion is a geometrical-optical illusion in which the parallel straight dividing lines between staggered rows with alternating black and white “bricks” appear to be sloped. [Graphic above by Fibonacci] Reported by Richard Gregory and Priscilla Heard in 1979, Gregory recalls: It was noted some time ago (Gregory 1973) by a then…
The café wall illusion is a geometrical-optical illusion in which the parallel straight dividing lines between staggered rows with alternating black and white “bricks” appear to be sloped. [Graphic above by Fibonacci] Reported by Richard Gregory and Priscilla Heard in 1979, Gregory recalls: It was noted some time ago (Gregory 1973) by a then…
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