Geometric illusions are visual phenomena where the perception of shapes, sizes, or angles is distorted. These illusions occur due to the way our brain interprets visual information, often leading to misjudgments about the actual dimensions of objects. Common examples include the Müller-Lyer illusion and the Ponzo illusion, where lines or shapes appear longer or shorter based on surrounding elements. These illusions highlight the complexities of human vision and how context influences perception. They demonstrate that our eyes can be deceived, revealing the differences between physical reality and our visual interpretation. Understanding geometric illusions can enhance our awareness of visual perception in art and design.