The concept is "optical distortion" or "anamorphosis." It involves placing a glass object over a flat surface that contains a specific pattern or image. When the glass object is rotated, it creates a visual distortion or alteration of the underlying pattern, resulting in a unique and intriguing visual effect.

This technique plays with the properties of light and the refractive nature of glass. As light passes through the glass, it undergoes refraction, causing the image or pattern underneath to appear distorted or stretched when viewed through the glass. By spinning the glass, the distortion dynamically changes, creating a captivating visual transformation.

It explores perception, depth, and the relationship between the viewer, the artwork, and the surrounding space.