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This optical illusion from a floor tile can easily make you sick.

Optical illusion of floor tiles

Optical illusion (visual illusion) - an error in visual perception caused by inaccuracy or inadequacy of the processes of unconscious correction of the visual image (lunar illusion, incorrect estimate of the length of segments, angles or color of the depicted object, illusion of movement, the illusion of the absence of an object - banner blindness, etc. .), as well as physical causes (“flattened moon”, “broken spoon” in a glass of water). The causes of optical illusions are investigated both when considering the physiology of vision and in the study of the psychology of visual perception.

In artistic images, deliberate distortion of perspective causes special effects, best known for the work of Maurice Escher (see, for example, his lithographs: Up and Down (1947), Convex and Concave (1955), Belvedere (1958) etc. The creation of optical illusions was often the theme of the works of Salvador Dali (see, for example, his paintings “The Slave Market with the Appearance of the Invisible Bust of Voltaire” (1938), “The Swans Reflected in Elephants” (1937), etc. Some optical illusions have been studied in Gestalt psychology (for example, en: Akiyoshi Kitaoka).

One of the things that gives confidence in life is the feeling of solid ground beneath your feet. But for some reason, the company responsible for this floor wants to relieve you of this feeling, forcing the brain not to believe what the legs feel.

The entrance to the ceramic tiles salon at Casa Ceramica in Manchester, England, looks like a funnel or a gravity well!

But in truth, this floor is actually flat and you just see the optical illusion created by the tile.

And it’s easy to see if you can reach the other end of the corridor and look back!

Optical illusion of floor tiles

Illusions often lead to completely incorrect quantitative estimates of real geometrical quantities. It turns out that it is possible to make a mistake by 25% or more if eye estimates are not checked with a ruler.

Eye estimations of geometrical real values ​​very much depend on the nature of the background image. This refers to the lengths (Ponzo illusion), areas, radii of curvature. It can also be shown that what has been said is true with respect to angles, shapes, and so on.

You can even view a short video of how the tiler laid this floor. Of course, this will finally destroy the illusion in your head, but it is still interesting.

Duncan Cook, director of Casa Ceramica, shared the video on Twitter to show how they created this effect. The tiles were laid with a curved pattern, which can be seen at an alternative angle.

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