Franz Müller-Lyer

The Müller-Lyer illusion is a visual phenomenon where two lines of equal length appear different because of arrow-like figures at their ends. One line has inward-pointing arrows (like arrowheads), making it seem shorter, while the other has outward-pointing arrows (like feathers), making it appear longer. Despite being the same length, our brains interpret the lines differently due to the surrounding shapes, highlighting how visual context influences perception. This illusion demonstrates how our visual system processes spatial information and can be fooled by certain patterns or cues.