TABLE 1.

Anthropometric Landmarks and Definition of Linear and Surface Distances

Abbreviation	Landmarks (mm)	Definition
Alar Base	Base of Alar	Distance between most lateral points on nasal alae
ExoCD	Exocanthal distance	Distance between right and left outer corners of eye fissure where eyelids meet
InterCD	Intercanthal distance	Distance between right and left inner corners of eye fissure where eyelids meet
N_B	Nasion, b point	Mid-point of nasofrontal suture (N) to most concave point between chin and lower lip point
N_Ll	Nasion, lower lip	N to junction between vermillion and soft tissue of lower lip in midline
N_Me	Nasion, menton	N to most inferior portion of chin on the midline
N_Pg	Nasion, pogonion	N to most projecting median point on the anterior surface of the chin
N_Prn	Nasion, pronasale	N to most protruded point of nasal tip
N_Ul	Nasion, upper lip	N to junction between vermillion and soft tissue of upper lip in midline
RtLtCuspidB	Right to left cupid’s bow	Distance between right and left points of the crest of the philtrum
RtLt_Ch	Right to left cheilion	Distance between outer corners of mouth
Tr_B	Tragion, b point	Notch above the tragus of the ear (Tr) to most concave point between chin and lower lip point
Tr_Ll	Tragion, lower lip	Tr to junction between vermillion and soft tissue of lower lip in midline
Tr_Me	Tragion, menton	Tr to most inferior portion of the chin on the midline
Tr_N	Tragion, nasion	Tr to mid-point of nasofrontal suture
Tr_Pg	Tragion, pogonion	Tr to most projecting median point on the anterior surface of the chin
Tr_Prn	Tragion, pronasale	Tr to most protruded point of nasal tip
Tr_RtCuB	Tragion, right cupid’s bow	Tr to right point on crest of philtrum
Tr_RtCh	Tragion, right cheilion	Tr to right outer corner of mouth
Tr_Sn	Tragion, sella-nasion line	Tr to a line connecting the sella to the nasion
Tr_Ul	Tragion, upper lip	Tr to junction between vermillion and soft tissue of upper lip in midline