Café Wall

The Café Wall Illusion is a optical illusion in which the parallel horizontal lines between rows of black and white 'bricks' appear to be sloped or slanted.

Wine Glass Illusion

Find a way to completely remove one of the glasses from the tray. This optical illusion was invented by Gianni A. Sarcone.

Straight Lines Illusion

The two vertical lines are both straight, but they look as if they were bowing outwards. The Hering Illusion is an optical illusion discovered by the German physiologist Ewald Hering in 1861.

Bigger Arc Illusion

The bigger the better. Which arc is bigger? The Jastrow Illusion is an optical illusion discovered by the American psychologist Joseph Jastrow in 1889. In this illustration, the two figures are identical, although the lower one appears to be larger.

3D Discs

French artist Marcel Duchamp created these Rotoreliefs, discs designed to be placed on the turntable of a gramophone. When rotating, each disc creates an illusion of depth. The illusion becomes more intense when viewed with only one eye.

Longer Line Illusion

The Müller-Lyer Illusion is an optical illusion consisting of nothing more than an arrow.

Taller Line Illusion

This is one of many versions of the Ponzo Illusion, an optical illusion that was first demonstrated by the Italian psychologist Mario Ponzo.

Taller Trumpeter Illusion

This is another version of the Ponzo Illusion, an optical illusion that was first demonstrated by the Italian psychologist Mario Ponzo.


The Phenakistoscope (also spelled Phenakistiscope) was an early animation device used to create the illusion of motion.

Top Hat Illusion

The top hat illusion is a variation of the T-Illusion. It is a a visual illusion in which the width of the brim of a top hat appears to be shorter than the height of the hat, despite the two lengths being equal.

Square Circle Illusion

The Ehrenstein Illusion is an optical illusion in which the sides of a square placed inside a pattern of concentric circles take an apparent curved shape.

Impossible Stairs Illusion

A variation on the Penrose Triangle, the Penrose Stairs or Penrose Steps, a.k.a. the Impossible Staircase, is an impossible object created by Lionel Penrose and his son Roger Penrose.

More Ducks

Get your ducks in a row in this interactive version of the Duck-Rabbit illusion!

More Lines Illusion

The Zöllner Illusion is a classic optical illusion in which a series of parallel black lines, which are crossed with short, repeating red lines, creates the illusion that the black lines are not parallel.

Vanishing Leprechaun

Have you seen the vanishing leprechaun? A geometric vanish in which 1 of 15 leprechauns vanishes when the puzzle pieces are rearranged.

Ambiguous Stairs Illusion

Proof that up is down and down is up. The Schroeder Stairs Ambiguous Figure was created by Heinrich G. F. Schröder. I personally added the ambigrams for additional ambiguous amusement.

Pac-Man Illusion

Blast from the past? This optical illusion known as the Kanizsa Triangle in which Illusory contours (or subjective contours) evoke the perception of a triangle.

Flower Power

The Ebbinghaus Illusion is an optical illusion of relative size perception.

Necker Cube

The Necker Cube is an ambiguous drawing that can be interpreted as being viewed from either above or below. It is named after Louis Albert Necker.

RR Tracks Illusion

Wrong side of the tracks. The Ponzo Illusion is an optical illusion that was first demonstrated by the Italian psychologist Mario Ponzo.

Perfect Squares Illusion

The perfect illusion? No, the perfect squares illusion. A variation on the Zöllner Illusion.

Which Lines Connect?

The Poggendorff Illusion is an optical illusion that involves the brain's perception of the interaction between diagonal lines and horizontal and vertical edges. It is named after Poggendorff, who discovered it.

Twin Tables Illusion

Which table is bigger? Would you bet your money on it? Shepard Tables (also known as the Shepard Tabletop Illusion) are an optical illusion, published by Roger N. Shepard, in which two identical table tops appear to be of different sizes.

Growing Bunny Illusion

Watch the bunny grow right before your very eyes. In the Waterfall Effect a.k.a. the Motion Aftereffect, or, the Spiral Aftereffect, the illusion of movement is experienced when looking at a stationary stimulus after looking at something moving in one direction for some time.

Ball & Shadow Illusion

Where is the ball in space? The shadow gives our brain important clues that help to determine the physical orientation of an object in space. Because of this, shadow can also be used to easily fool us. See how shadow influences the perception of position.

Colorful Carrots Illusion

There's more to this colorful optical illusion than meets the eyes. A Negative Afterimage, in which a negative image appears in the eyes after a period of exposure to the original (positive) image.

Bulge Illusion

Do you see a bulge? In the Checkerboard Bulge Illusion, from Akiyoshi Kitaoka, a checkerboard appears to bulge.


Liar, liar, pants on fire! An Optical Illusion by Paul Agule.

Leaning Tower Illusion

This illusion is best described as visual rather than optical because the "trick" happens in the mind not the eyes.

Friend or Pirate?

You decide friend or foe. An ambiguous image or reversible figure which allows perception of two distinct image forms.

Illusion of Motion

A tribute to world's most popular optical illusion! Illusory motion, in which a succession of static images creates the illusion of motion.

Bar Code Animation

Barrier-grid animation, also known as a kinegram, and picket fence animation and often referred to as Scanimation, is an animation effect created by moving a striped transparent overlay across an interlaced image.

Impossible Triangle

The Penrose Triangle, also known as the Penrose Tribar, or the Impossible Tribar was first created by the Swedish artist Oscar Reutersvärd in 1934. The psychiatrist Lionel Penrose and his mathematician son Roger Penrose independently devised and popularized it in the 1950s.

Pulsating Snowflake

Gianni A. Sarcone designed this Pulsating Star illusion, based on the Müller-Lyer Illusion principle.

Checker Shadow Illusion

Edward H. Adelson, Professor in Vision Science at MIT, published this optical illusion in 1995.

Figure Ground +

Do you see black figures on a white background, or do you see white figures on a black background?

Jumping Pylon

Can you hear (or even feel) with your eyes? Is this an visual illusion, or a tactile or auditory hallucination?

Ready for My Close-Up

A hybrid image is an image that is perceived in one of two different ways, depending on viewing distance. A technique for creating hybrid images was developed by Aude Oliva of MIT and Philippe G. Schyns of University of Glasgow.

Crop Circle Spinner

Take these Crop Circles for a Spin! Much like the Rotoreliefs and Phenakistoscopes above, rotating these crop circles create interesting optical effects.

Stepping Feet Illusion

A motion perception phenomenon occurring when two buses, one blue and the other yellow, move horizontally across a street consisting of black and white stripes. Both buses move at a constant speed, however, their perceived speed varies dramatically.

Magic Mirror Movies

Thrilling animations will skip along before you eyes as these records play on this interactive turntable!

Share the Illusions
Support the Illusions