How it works: The diagonal patterns created by the tiny squares distort the perception making the lines appear curved when they're actually straight.
If you like these optical illusions, you'll enjoy these Mind-Bending Optical Illusion Books
Skewed Checker Board Optical Illusion
By Dave Fisher, About.com Guide
Regardless of what your eyes tell you, all the lines in this pattern are perfectly straight.
Optical Illusion Image Gallery - Skewed Checker Board
Optical Illusions and Visual Puzzles
Watizzits? - Views-to-ConfuseProblem Postage - Spot the Difference PuzzlesAmbigrams - Topsy-Turvy Matchbox Art
More Optical Illusions and Visual Puzzles
Optical Illusions - The Missing PrincessSpot the Difference PuzzlesOptical Illusions - Checker Shadow Illusion
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