Symmetry of the face is the one of the most important features for the perception of attractiveness. Symmetry means both sides of the face, right and left, are alike. Many human body parts undergo development with bilateral symmetry. This implies that the right and left sides can be divided into identical mirror images, but the face often presents with a mild degree of asymmetry. The degree of asymmetry has a negative impact on functional and facial aesthetics. Anthropological research has shown that symmetry and averageness are important keys to the attractiveness of human faces. In today's era, facial attractiveness is valued the most and multiple measures are taken to maintain or achieve facial attractiveness.