Geometric Optical Illusions
It defies logic! At least, that's what puzzle-doers will think as they work their way through this largest-ever compendium of geometric conundrums. When you look at these images--some classic, others never-before published--you'll have a hard time believing what the captions say about their size, shape, or other geometric aspect. For example, two tables appear radically different to the naked eye--but they're actually identical in size and shape. It's all a matter of perspective and perception. Each puzzle is eye-opening.
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Al Seckel angle appears appear misaligned appears larger arrows background Balconies balls appear bend Box Illusion Bulging Cafe Check your ansiver Check your answer Circle Illusion concentric circles Curvature Deforming Square Distorted Square dot appear edges to define Estimation Illusion eyes figure GEOMETRIC horizontal and vertical horizontal line horse Illusion Move Illusion of Extent Illusion Which colored Illusion Winch Illusory interpreting images IVhich ivith length Line Illusion line segments appear lines are straight lines intersect look Lotto's Perspective Illusion Louis Arch Miiller-Lyer Misaligned Dots Moon Illusion Move this image OPTICAL ILLUSIONS perceive a spiral perfect circles perfect square Piano Pinna's Plank Poggendorf Illusion Ponzo Illusion purple Purves and Lotto's red line appear row of house ruler Seckel segment is longer slanted squares appear distorted Stack of Coins straight and parallel straightedge Striped Bars Tabletop tilted triangle Twisted vertical lines appear Wall warped Wundt