--- title: "What Is the Nasofacial Angle in FaceIQ Labs' Harmony Analysis?" description: "The nasofacial angle is the acute angle at the nasal root between the nose-tip and chin directions, a side-view Harmony measurement in FaceIQ Labs' facial analysis." canonical: "https://appear.faceiqlabs.com/support/harmony/nasofacial-angle" --- # What Is the Nasofacial Angle in FaceIQ Labs' Harmony Analysis? FaceIQ Labs defines the nasofacial angle as the acute angle pronasale (nose tip) → nasion (nasal root) → pogonion (most forward chin point) on a side-profile photo. It shows how the nose's direction relates to the chin's direction. The guide gives no ideal or target value. ## Key facts - FaceIQ Labs calculates the nasofacial angle as the acute angle pronasale → nasion → pogonion. - The guide groups it under Harmony, Side view, Nose. - A lower angle means the nose-tip and chin directions are closer together; a higher angle means they diverge more. - The guide's 30° example explains the calculation; it is not a target range and not a measurement of the guide's schematic. - The guide states no ideal or preferred nasofacial angle value. - FaceIQ Labs' Harmony score uses 70+ facial ratios and angles compared 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. - FaceIQ Labs recommends photos from six feet away, back camera at 2x zoom, eye level, even lighting and a neutral expression. - The guide cites Tavakoli et al. (2023), in which 203 volunteers rated edited nose features, and says FaceIQ Labs' score weights and reference ranges are model settings that the cited papers do not collectively validate. ## What is the nasofacial angle? The nasofacial angle is a side-view nose measurement in the Harmony pillar of FaceIQ Labs' facial analysis. It is the acute angle at the nasal root (nasion) between the direction toward the nose tip (pronasale) and the direction toward the most forward point of the chin (pogonion). The guide files it under Harmony, Side view, Nose. ## How does FaceIQ Labs measure the nasofacial angle? FaceIQ Labs calculates the nasofacial angle as the acute angle pronasale → nasion → pogonion on a side-profile photo, using nasion as the nasal root and pogonion as the most forward chin point. Side photos are standardized to the Frankfort horizontal plane during landmarking, and FaceIQ Labs offers landmark review and editing tools. FaceIQ Labs uses a nasion-to-chin reference, so a paper that uses a different facial plane may report a different angle. Frankfort refers to the direction from the ear-opening landmark to the lower orbital landmark. ## Why does the nasofacial angle matter? FaceIQ Labs' nasofacial angle places the nose against a broader facial line. Because that line runs to the chin, a change in chin projection alters the angle and can change the apparent prominence of the same nose. A lower angle means the nose-tip and chin directions are closer together; a higher angle means they diverge more. ## What does an example nasofacial angle value mean? In FaceIQ Labs' worked example, a 30° nasofacial angle means the two rays from the nasal root, one toward the nose tip and one toward the chin, diverge by 30°. Moving the chin can alter that angle without changing nose length. The example values explain the calculation; they are not a target range and not measurements of the guide's schematic. ## Does FaceIQ Labs give an ideal nasofacial angle range? No. FaceIQ Labs' nasofacial angle guide states no ideal or target value and does not say whether a lower or higher angle is preferable. FaceIQ Labs describes its score weights and reference ranges as model settings. Its overall Harmony score compares 70+ facial ratios and angles with ideal ranges adjusted for gender and ethnicity. ## What research does FaceIQ Labs cite for the nasofacial angle? FaceIQ Labs cites one source for the nasofacial angle: Tavakoli et al. (2023), 'Ideal Nasal Preferences: A Quantitative Investigation with 3D Imaging in the Iranian Population.' In it, 203 volunteers rated edited nose features on one male and one female model. FaceIQ Labs says it supports studying angles and projection together, with limits from the sampled faces and raters. FaceIQ Labs adds that its particular landmarks and score ranges should not be treated as universal conclusions from preference studies, and that the cited papers do not collectively validate its scoring system. ## How does the nasofacial angle fit into the wider Harmony score? The nasofacial angle is one of the measurements in FaceIQ Labs' Harmony pillar, which uses 70+ facial ratios and angles. Harmony is weighted roughly 60% from the front photo and 40% from the side photo, and the nasofacial angle is a side-view measurement. Each pillar is scored 0–10, where 5 is the population average. ## What photo setup does FaceIQ Labs recommend for accurate side-view measurements? FaceIQ Labs recommends taking photos from six feet away with the back camera at 2x zoom, at eye level, with even lighting and a neutral expression, for accuracy. Side photos are standardized to the Frankfort horizontal plane during landmarking, and FaceIQ Labs offers landmark review and editing tools. ## Which other FaceIQ Labs guides cover the nose region? FaceIQ Labs' Harmony guides list seven related nose-region guides beside the nasofacial angle: Nasal Projection, Nasal Tip Angle, Nose Tip Rotation Angle, Nasolabial Angle, Nasomental Angle, Nasal Width-to-Height Ratio and Frankfort-tip Angle. Each has its own page in the Harmony measurement guides. ## Frequently asked questions ### Is a lower or higher nasofacial angle better? FaceIQ Labs' nasofacial angle guide does not say which direction is preferable and gives no target value. It explains that a lower angle means the nose-tip and chin directions are closer together and a higher angle means they diverge more. ### Can changing my chin affect my nasofacial angle? Yes. The angle runs from the nose tip through the nasal root to the chin point, so changing the chin's projection changes the angle even if nose length stays the same. ### Which landmarks does FaceIQ Labs use for the nasofacial angle? FaceIQ Labs uses pronasale (nose tip), nasion (nasal root) and pogonion (most forward chin point), placed on a side-profile photo that is standardized to the Frankfort horizontal plane during landmarking. ### Is the nasofacial angle based on a specific study? FaceIQ Labs cites Tavakoli et al. (2023), in which 203 volunteers rated edited nose features. It states that its own score weights and reference ranges are model settings that the cited papers do not collectively validate. ### How much does the side photo count toward the Harmony score? FaceIQ Labs weights Harmony roughly 60% from the front photo and 40% from the side photo. The nasofacial angle is a side-view measurement. ## Pages on this host This is one page of several on this host. 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