Table 1 The abbreviation and definition of landmarks used in the study
Landmark | Abbreviations | Definition |
|---|---|---|
Posterotragion | pt’ | Most posterior point on the tragus |
Alare | al’ | The most lateral point on the nasal alar |
Exocanthion | ex’ | Most lateral point of the palpebral fissure, at the outer commissure of the eye; best seen when subject is gazing upward |
Cheilion | ch’ | Outer corners of the mouth where the outer edges of the upper and lower vermilions meet |
Chin foot point | cf’ | Through ch’ draw a line perpendicular to the lower border of mandible; The intersection point is cf’ |