Fraser Spiral Illusion, False Spiral - Pictures & Images of Optical Illusions

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Photo name: Fraser Spiral Illusion
Picture category: Illusions
Image size: 104 KB
Dimensions: 620 x 623
Photo description: This optical illusion image is known as a Fraser spiral illusion, or false spiral. The black arcs appear to form a spiral when in fact they are a series of concentric circles.

This image is known as a Fraser spiral illusion, or false spiral. The black arcs appear to form a spiral when in fact they are a series of concentric circles.