What Is the Nasomental Angle in FaceIQ Labs' Harmony Analysis?
FaceIQ Labs' nasomental angle is a side-view Harmony measurement taken at the nose tip, between the line to the nasal root (nasion) and the line to the most forward chin point (pogonion). Lower values mean a more closed root–tip–chin angle and higher values a more open one. The guide gives no target range.
Key facts
- The nasomental angle is calculated as nasion → pronasale → pogonion, with the nose tip as the vertex.
- It is a side-view, nose-related measurement in FaceIQ Labs' Harmony & facial ratios guides.
- A lower angle is a more closed root–tip–chin angle; a higher angle is a more open relationship at the tip.
- It differs from the Nasofacial Angle, which uses the nasal root as its vertex; the two are not interchangeable.
- The guide's 125° and 135° figures are worked-example values, not a target range.
- FaceIQ Labs' Harmony pillar compares 70+ facial ratios and angles to ideal ranges adjusted for gender and ethnicity.
- Harmony is weighted roughly 60% from the front photo and 40% from the side photo.
- Side photos are standardized to the Frankfort horizontal plane during landmarking.
- The guide cites Tavakoli et al. (2023) as background and says its own score weights and reference ranges are model settings that these papers do not validate.
What is the nasomental angle in FaceIQ Labs' Harmony analysis?
The nasomental angle is a side-view nose measurement in FaceIQ Labs' Harmony guides. It is the angle at the nose tip (pronasale) between the line to the nasal root (nasion) and the line to the most forward chin point (pogonion), calculated as nasion → pronasale → pogonion.
Why does FaceIQ Labs measure the nasomental angle?
FaceIQ Labs' guide says the nasomental angle relates the nose and chin directly in profile. That is why changing chin projection alters profile balance even though the nose itself is unchanged: the angle depends on both the nose-tip position and the chin point, not on the nose alone.
What do lower and higher nasomental angle values mean?
In FaceIQ Labs' nasomental angle guide, a lower value is a more closed root–tip–chin angle and a higher value is a more open relationship at the nose tip. The guide's worked example has two profiles with the same nose giving 125° in one and 135° in the other because the chin point differs.
Does FaceIQ Labs give an ideal range for the nasomental angle?
No. FaceIQ Labs' nasomental angle guide states no target or ideal value. Its 125° and 135° figures are example values that explain the calculation; they are not a target range and not measurements of the guide's schematic, which is not an ideal face or a scored result.
How is the nasomental angle different from the Nasofacial Angle?
The nasomental angle has its vertex at the nose tip, while FaceIQ Labs' Nasofacial Angle uses the nasal root as its vertex. Because the two angles are anchored at different points on the profile, the guide says they are not interchangeable. The nasomental angle runs nasion → pronasale → pogonion.
How does the nasomental angle relate to the Harmony score?
The nasomental angle is a side-view measurement listed among FaceIQ Labs' Harmony guides. The Harmony pillar compares 70+ facial ratios and angles to ideal ranges adjusted for gender and ethnicity, weighted roughly 60% from the front photo and 40% from the side photo. Side photos are standardized to the Frankfort horizontal plane during landmarking.
What do the landmark terms in the nasomental angle guide mean?
In FaceIQ Labs' guides, nasion means the nasal root, subnasale the nose base, and pogonion the most forward chin point. The nasomental angle's vertex is the nose tip (pronasale). Frankfort refers to the direction from the ear-opening landmark to the lower orbital landmark. The guide's schematic is not to scale.
What research does FaceIQ Labs reference for the nasomental angle?
FaceIQ Labs' nasomental angle guide cites one source: Tavakoli et al. (2023), 'Ideal Nasal Preferences: A Quantitative Investigation with 3D Imaging in the Iranian Population.' It asked 203 volunteers to rate edited nose features on one male and one female model. FaceIQ Labs says its score weights and reference ranges are model settings these papers do not validate. The guide notes the study has limits from the sampled faces and raters.
Frequently asked questions
Which landmarks does FaceIQ Labs use for the nasomental angle?
Three landmarks: nasion (the nasal root), pronasale (the nose tip, which is the vertex) and pogonion (the most forward point of the chin).
Is the nasomental angle the same as the Nasofacial Angle?
No. The nasomental angle's vertex is the nose tip, while the Nasofacial Angle uses the nasal root as its vertex, so FaceIQ Labs treats them as not interchangeable.
Can changing the chin change the nasomental angle without changing the nose?
Yes. FaceIQ Labs explains that the angle relates nose and chin directly, so a different chin point can change it even when the nose is the same, for example 125° in one profile and 135° in another.
Does FaceIQ Labs say what the target nasomental angle should be?
No. The guide states that its example values are not a target range and gives no ideal value for this angle.
Does the cited research validate FaceIQ Labs' scoring?
No. FaceIQ Labs says its score weights and reference ranges are model settings and that the papers it lists do not collectively validate the scoring system. The one cited study also has limits from its sampled faces and raters.