Victor Vasarely. Tegla-Hat, 1972. Victor Vasarely, widely regarded as the father of Op Art, was one of the most influential figures of 20th-century abstract art. His research into visual perception, color, and geometry transformed the relationship between viewer and image, creating compositions capable of producing movement, depth, and optical vibration through precise mathematical structures. "Copyright 1975 Editions du Griffon, Neuchâtel / Suisse" on the back. Dry stamp of the Vasarely Foundation. Photolithography on gloss paper. Total dimensions: 27 × 27 cm. Fine condition. In Tegla-Hat (1972), Vasarely constructs a powerful optical volume using a grid of square modules progressively distorted toward the center, creating the illusion of a spherical expansion emerging from a flat surface. The transition from deep blue tones to bright orange and white intensifies the sense of internal light, giving the composition a radiant, almost architectural presence. Rather than representing form, Vasarely generates it through a programmed visual system. Each element follows a strict geometric logic, yet the result appears dynamic and organic, as if the structure were breathing or pulsating. This tension between mathematical order and visual movement defines the artist’s mature Op Art language. The work belongs to the period in which Vasarely fully developed his concept of universal plastic language, based on repeatable modules that could be adapted to painting, architecture, design, and urban space. His approach anticipated later developments in digital imagery, algorithmic art, and parametric design.