The balance that the eye requires of the images, and which it tends to the re-establish when it is lost, has different levels. There is the level of retinal perception, or of sensation, and the level of the concept, of the theorem, revealed only visually by means of art.
Prejudicial factors are also involved, and are accepted with reserve because they have become part of the common experience; they are codes of visual communication: for example, quadrangular patterns tend towards the dark, circular or elliptical towards the light, towards luminosity. It is for this reason that it is sufficient to place a black surface evocative of a square in a condition of obliquity to alter its internal gravity and determine an alteration of equilibrium, which justifies the reversal of the situation, where the breaking of this scheme is represented by the yellow elliptical form, which is both luminous and expansive.
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