Fig. 2

Observational points on the face. A/a: tragus parallel to the upper wall of the external acoustic canal, B/b: central position above the eyebrow, C/c: center of the upper eyelid, D/d: center of the lower eyelid, E/e: angulus oculi temporalis, F/f: angulus oculi medialis, G/g: ala of the nose, H/h: corner of the mouth, I: root of the columella nasi, J: center of eyebrows, K: bony–cartilaginous junction along the nasal dorsum, II: philtrum, and III: center of the lower lip