Illusions of Color
Black Dots
More Black Dots
Grey Dots
More Dots
Circles
Colors
Names and Colors
Checker Shadow
Haze
The Kanizsa Triangle

Double Meanings
Duck/Rabbit
Bridge/Boats
Good/Evil
Teach/Learn
Optical/Illusion
Me and You
Cubes
Staircase
Faces
More Faces
More Faces
More Faces
More Faces
Face of Christ
Another Face
Boy / Girl
Margaret Thatcher
Einstein
Cube
Jigsaw Puzzle
Deer
The Word lift
The Word Liar
Skull
Indian or Eskimo?
Eye Test

Impossible Objects
Ladders and Ropes
Box
Another Box
Another Box
Box (Comic)
Thiery's figure
A Washer
Elephant
Stairs
Penrose Triangle
Dice Triangle
Trident
Another Trident
Planks -- Vertical
Planks -- Horizontal
Quadrilateral
Rare Construction
Center Beam
How Many Posts?

Illusions with Rectangles,
Lines, Circles, and Ellipses

Square & Circle
Poles
Circles
More Circles
More Circles
More Circles
Toilet Paper Roll
Turning Circles
Lines
More Lines
More Lines
Tabletops
Petals
Ellipses
More Ellipses
Rotating Snakes
Spiral

Miscellaneous Illusions
Sentence
Ball
Leaning Towers?
Photograph of Girl
Open Door

Links
Bach's Optical Illusions
Optical Illusions 4 Kids
Stereograms
Escher Pictures