# Nasal Projection

Harmony · Side view · Nose · https://www.faceiqlabs.com/support/harmony/nasal-projection

How far the nose tip extends in front of the nasal wing, relative to a constructed nose length.

## What is measured

Calculation: Horizontal subalare-to-tip projection ÷ tip-to-extended-dorsum length

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

Scaling projection by nose length distinguishes a long nose with proportional reach from a short nose with the same forward reach. Projection and rotation describe different aspects of the tip.

- Lower: less forward tip reach relative to the constructed length.
- Higher: more forward tip reach relative to that length.

## Where the idea comes from

Evidence: FaceIQ adaptation. Projection-to-length ratios are used in rhinoplasty assessment. FaceIQ extends the tip-to-rhinion direction to nasal-root height for its denominator; that construction is not interchangeable with every clinical projection method.

## A worked example

A 30-unit horizontal projection divided by a 50-unit constructed length gives 0.60.

Example values explain the calculation. They are not a target range.

## How to read your result

The denominator follows an extended dorsal line. Do not replace it with the vertical nose height or an unverified published formula.

## Research & further reading

These sources explain the history or related evidence. FaceIQ’s score weights and reference ranges are model settings; the papers do not collectively validate the scoring system.

- Tavakoli et al. (2023). [Ideal Nasal Preferences: A Quantitative Investigation with 3D Imaging in the Iranian Population](https://pubmed.ncbi.nlm.nih.gov/37564715/). Asked 203 volunteers to rate edited nose features on one male and one female model. Supports studying angles and projection together, with limits from the sampled faces and raters.

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Source: https://www.faceiqlabs.com/support/harmony/nasal-projection · FaceIQ Labs overview for AI assistants: https://www.faceiqlabs.com/llms.txt