Optical illusions are characterized by the separation between the physical reality and the subjective perception of an object or event. When we encounter an illusion, we may see something that isn’t there or neglect to see something that is there. Because of this disconnection between perception and reality, visual illusions demonstrate the ways in which the brain can fail to re-create the physical world.
Here are some optical illusions that will make you doubt your own eyes.
1. Ambiguous Object Illusion
An incredible ambiguous object illusion by mathematician Kokichi Sugihara of Meiji University in Japan, the inventor of this illusion and art form. A clever combination of reflection, perspective, and viewing angle produce this striking illusion.
Two parabolic mirrors create a 3D image above the actual object. The image is not a hologram and is produced solely by reflection off special concave mirrors.
3. Kinetic Art
Kinetic art is art from any medium that contains movement perceivable by the viewer or depends on motion for its effect.
Hanging by fishing line, a single rod of aluminum is shaped into connected helixes- one clockwise the other counterclockwise. When spinning the rotational motion creates translational motion both upwards and downwards along the vertical direction
4. Flicker Fusion Illusion Top
When spun fast enough the top parts of this hand carved top appear as floating disks. The stem of this top has components off axis and the floating disks appear when the spin rate exceeds the flicker fusion frequency of our eyes.
5. Lenticular printing
Lenticular Image cause different images to be seen when the object is viewed from different angles.
6. Helical motion illusion
Spinning desk toy creates a mind-bending optical illusion of continuously flowing helix.
7. Andris Tri-Zonal Space Warper
Stare at the center of the spirals for at least 15 seconds- the next thing you look at will appear to be in motion. This spinning disk top features the famous illusion by magician Jerry Andrus that demonstrates aspects of the physics and psychophysics of our visual perception- specifically the part of our brain that detects motion