Ghost Dots

Ghost Dots
Gianni Sarcone

Do you perceive bright ‘ghost’ blobs or smudges at the intersections of the lines? There are many explanations and counter-explanations regarding this illusion, which is related to the Hermann grid illusion. The illusory effect disappears if you look at the picture from a distance or too closely. This picture was taken from my book: “World of Visual Illusions”


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