Facial symmetry refers to the degree to which one side of a person's face mirrors the other. In a perfectly symmetrical face, the left and right halves are identical in shape and features. However, most people's faces have some degree of asymmetry, which is completely normal and can even add character. Research suggests that facial symmetry is often associated with attractiveness and health. Many studies indicate that people tend to perceive symmetrical faces as more appealing. This preference may be rooted in evolutionary biology, where symmetry is seen as a sign of genetic fitness and overall well-being.