Facial symmetry refers to the degree to which one side of a person's face mirrors the other. It is often measured by comparing the alignment and proportions of facial features, such as the eyes, nose, and mouth. High facial symmetry is frequently associated with attractiveness and is considered a sign of good health and genetic fitness. Research suggests that humans are naturally drawn to symmetrical faces, which may be rooted in evolutionary biology. In art and design, facial symmetry is also a key principle, influencing how we perceive beauty and harmony in visual representations.