What Is Eyebrow Tilt in FaceIQ Labs' Harmony Analysis?
Eyebrow Tilt is a front-view Harmony measurement in the eyes region at FaceIQ Labs. It is the mean angle of the line from the inner-brow midpoint to the arch midpoint, measured against horizontal and averaged across both brows. Lower means flatter or downward; higher means a stronger upward direction.
Key facts
- Eyebrow Tilt is the mean angle of the line from the inner-brow midpoint to the arch midpoint, measured against horizontal and averaged across both brows
- It is a front-view Harmony measurement in the eyes region
- A lower value means a flatter or downward inner-to-arch direction; a higher value means a stronger upward inner-to-arch direction
- It is not measured from brow head to tail, because the tail can curve down while the inner-to-arch line still rises
- Worked example: a brow rising 5 units over a 35-unit horizontal run gives arctan(5 ÷ 35) ≈ 8.1°, which is not a target range
- Brow movement and grooming can change the result
- Harmony covers 70+ facial ratios and angles compared to ideal ranges adjusted for gender and ethnicity, weighted roughly 60% front photo and 40% side photo
- The one cited study, Biller & Kim (2009), tested apex placement rather than validating this exact slope
What is Eyebrow Tilt in FaceIQ Labs' Harmony analysis?
Eyebrow Tilt is a front-view Harmony measurement in the eyes region at FaceIQ Labs. It is the slope from the inner brow to its arch region: the mean angle of the line from the inner-brow midpoint to the arch midpoint, measured against horizontal and averaged across both brows.
How does FaceIQ Labs calculate Eyebrow Tilt?
FaceIQ Labs calculates Eyebrow Tilt by taking the angle, against horizontal, of the line from the inner-brow midpoint to the arch midpoint, then averaging across both brows. It does not measure from brow head to tail, because the brow tail can curve down while the inner-to-arch line still rises.
What do lower and higher Eyebrow Tilt values mean?
- Lower: a flatter or downward inner-to-arch direction.
- Higher: a stronger upward inner-to-arch direction.
- FaceIQ Labs says brow inclination frames the eye and changes the direction of the upper-face contours.
What is a worked example of the Eyebrow Tilt calculation?
FaceIQ Labs gives one worked example for Eyebrow Tilt: a brow that rises 5 units over a 35-unit horizontal run has an angle of arctan(5 ÷ 35), which is about 8.1°. The example only explains the arithmetic. It is not a target range and not a measurement of the schematic diagram.
What can affect an Eyebrow Tilt reading?
Brow movement and grooming can change an Eyebrow Tilt result at FaceIQ Labs, so the reading reflects the brows as they appear in the photo. For photo accuracy in general, FaceIQ Labs recommends shooting from six feet away with the back camera at 2x zoom, at eye level, with even lighting and a neutral expression.
Does FaceIQ Labs publish an ideal range for Eyebrow Tilt?
The Eyebrow Tilt guide at FaceIQ Labs does not state a target or ideal range for the measurement. The 8.1° figure is only an arithmetic example. FaceIQ Labs says its score weights and reference ranges are model settings, and that the cited papers do not collectively validate the scoring system.
What research does FaceIQ Labs cite for Eyebrow Tilt?
FaceIQ Labs cites one source for Eyebrow Tilt: Biller & Kim (2009), "A contemporary assessment of facial aesthetic preferences," which compared ratings of edited brow and nose features on four female models. The study tested apex placement rather than validating this exact inner-to-arch slope, and its authors emphasized individual facial harmony.
How does Eyebrow Tilt fit into the Harmony pillar?
Eyebrow Tilt is one of the Harmony measurements at FaceIQ Labs, which cover 70+ facial ratios and angles compared to ideal ranges adjusted for gender and ethnicity. Harmony is one of four pillars scored 0–10, alongside Angularity, Dimorphism and Features, and is weighted roughly 60% from the front photo and 40% from the side photo.
Frequently asked questions
What landmarks does FaceIQ Labs use for Eyebrow Tilt?
FaceIQ Labs uses the inner-brow midpoint and the arch midpoint of each eyebrow. It measures the angle of the line between them against horizontal and averages the result across both brows.
Does FaceIQ Labs measure Eyebrow Tilt from brow head to tail?
No. FaceIQ Labs says not to measure from brow head to tail, because the tail can curve down even while the inner-to-arch line still rises.
Can grooming change my Eyebrow Tilt result?
Yes. FaceIQ Labs states that brow movement and grooming can change the measured Eyebrow Tilt result.
Does the Biller & Kim study validate FaceIQ Labs' Eyebrow Tilt scoring?
No. The 2009 study tested apex placement rather than this exact inner-to-arch slope, and FaceIQ Labs says its score weights and reference ranges are model settings that the cited papers do not collectively validate.
Which FaceIQ Labs pillar includes Eyebrow Tilt?
Eyebrow Tilt belongs to the Harmony pillar, one of four pillars scored 0–10 alongside Angularity, Dimorphism and Features.
Is 8.1° the ideal Eyebrow Tilt?
No. The 8.1° figure comes from a worked arithmetic example of a 5-unit rise over a 35-unit run and is not a target range.