Harmony · Side view · Upper Third
Upper Forehead Slope
The difference in direction between two lines from the brow prominence to the upper forehead.
What is measured
The calculation
Angle: hairline → glabella → forehead landmark
Side view / Measurement guide
Follow the measurement
Dots mark the landmarks. Lines show how the measurement is taken.
In these guides, nasion means the nasal root, subnasale the nose base, and pogonion the most forward chin point. Frankfort refers to the direction from the ear-opening landmark to the lower orbital landmark.
Why it matters
This describes the contour above the brow separately from the forehead’s overall tilt. A straight forehead can be inclined while these two directions remain close together.
- Lower: the hairline and forehead landmark lie in nearly the same direction from the glabella.
- Higher: the two directions diverge more.
Where the idea comes from
FaceIQ adaptation
This is a FaceIQ photographic construction. Clinical profile analysis provides context, but the cited work does not validate this exact landmark formula or its scoring range. [1]
A worked example
Two rays only 2° apart indicate a small contour difference. If they separate to 8°, the measured difference grows even if the head is not rotated.
Example values explain the calculation. They are not a target range and are not measurements of the schematic above.
Research & further reading
The sources below explain the history or related evidence. FaceIQ’s score weights and reference ranges are model settings; these papers do not collectively validate the scoring system.
[1] Farkas et al. · 2005
International anthropometric study of facial morphology in various ethnic groups/racesDocuments variation in facial dimensions across sampled populations. Descriptive measurements explain variation; they do not establish an attractiveness score.