Harmony · Side view · Nose
Frankfort-tip Angle
The direction from the nose base to the tip relative to the Frankfort plane.
What is measured
The calculation
Absolute angle between subnasale–pronasale and porion–orbitale directions
Side view / Measurement guide
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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 places tip direction within a head reference. It differs from Nose Tip Rotation Angle because it uses the nose tip rather than the columella as its endpoint.
- Lower: the nose-base-to-tip direction lies closer to the reference.
- Higher: it deviates more; the absolute value does not preserve above/below direction.
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
A base-to-tip segment 20° away from the Frankfort line gives 20°, whether the signed difference is positive or negative.
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] Biller & Kim · 2009
A contemporary assessment of facial aesthetic preferencesCompared ratings of edited brow and nose features on four female models. The authors emphasized individual facial harmony; this is context for feature relationships, not a test of every brow metric.