# Ipsilateral Alar Angle

Harmony · Front view · Nose · https://www.faceiqlabs.com/support/harmony/ipsilateral-alar-angle

An angle relating the two outer eyelid-hood endpoints to the nose-bottom landmark.

## What is measured

Calculation: Interior angle: left outer eyelid hood → nose bottom → right outer eyelid hood

## Why it matters

This summarizes a triangular relationship between the lateral eye region and the nose. Eye-region width and vertical nose placement both change the triangle.

- Lower: a narrower angle at the nose, from a taller triangle or closer outer eye points.
- Higher: a wider angle at the nose, from a shorter triangle or wider outer eye points.

## Where the idea comes from

Evidence: FaceIQ adaptation. This is a FaceIQ landmark-based description of facial shape. The linked research provides background on facial measurement or perception; it has not directly validated this exact formula or its score.

## A worked example

If the rays from the nose bottom to the two outer eyelid-hood points enclose 88°, the result is 88°. Moving the outer points farther apart widens that angle.

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

## How to read your result

Despite its name, this is not the slope of a nostril edge. The app uses the outer eyelid-hood points and nose bottom.

## 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.

- Pallett, Link & Lee (2010). [New “Golden” Ratios for Facial Beauty](https://pmc.ncbi.nlm.nih.gov/articles/PMC2814183/). Four experiments varied eye spacing and eye-to-mouth distance in face images. Preferences depended on feature arrangement. The tested ratios and stimuli do not validate every FaceIQ measurement or a universal ideal.

---

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