The Ebbinghaus Illusion is a visual phenomenon that demonstrates how the perception of size can be influenced by surrounding objects. In this illusion, a central circle appears larger or smaller depending on the size of the circles surrounding it. When larger circles are placed around the central circle, it seems smaller, while smaller surrounding circles make it appear larger. This illusion was named after the German psychologist Hermann Ebbinghaus, who studied memory and perception in the late 19th century. The Ebbinghaus Illusion highlights the brain's reliance on context when interpreting visual information, illustrating how our perceptions can be easily manipulated by external factors.