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Profile convexity (brow)

facial convexity

The standard soft-tissue measure of profile shape. Concave profiles read above 180°; they are never folded back below it.

How it's measured

Angle at the base of the nose (subnasale) between the brow ridge (glabella) and the chin (pogonion), measured on the side towards the ear. 180° is a straight profile. Less is convex (midface in front of the brow-chin line), more is concave (midface behind it).

Reference range

Male reference

168–176°

Female reference

168–176°

Source: Community facial analysis formula (public spreadsheet), top range: 168-176°. The same angle is the convexity measure in Legan HL, Burstone CJ. J Oral Surg 1980;38:744-751.

In the score

Counts toward the score with weight 10 (Community formula point table: facial convexity (glabella), 10 points).

One number, one feature

One measurement describes one detail in one photo. Pose, lens and expression move it, and every reference range is an average from limited samples.