Medium-size circle surrounded by smaller circles appears larger than same-size circle surrounded by larger circles {Ebbinghaus illusion} {Titchener circles illusion}, a late-visual-processing pictorial illusion.
Lines with inward-pointing arrowheads and adjacent lines with outward-pointing arrowheads appear to have different lengths {Müller-Lyer illusion}.
If railroad tracks and ties lead into distance, and two horizontal bars, even with different colors, are at different distances, farther bar appears longer (Mario Ponzo) [1913] {Ponzo illusion}. Perhaps, line tilt, rather than depth perception, causes Ponzo illusion.
Vertical lines with equally spaced parallel line segments at 45-degree angles can make illusions {Zollner illusion}.
1-Consciousness-Sense-Vision-Illusions
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Date Modified: 2022.0225