Harmony & facial ratios
Eye Separation Ratio
1 min read · Updated October 4, 2026
The distance between your pupils as a percentage of your cheekbone width.
What it is
This compares how far apart the pupils sit with how wide the face is. It places the eyes on the face: closer together, centred, or wider apart.
How it's measured
Pupil distance is divided by cheekbone width and multiplied by 100. Both are landmark distances in a levelled frame.
How it's read
On most adult faces the pupils sit at about the mid-40s percent of cheekbone width. A noticeably lower figure means closer-set eyes and a higher one wider-set eyes, relative to the face.
What affects it
Because it uses face width as the reference, a wide-angle selfie distorts it. A neutral, level photo from a normal distance gives the most reliable figure. Where you look matters too: crossing or drifting eyes shift the pupil points.
Related measurements
In the same group: Eyebrow Tilt, Eyebrow Low Setedness and Brow Length to Face Width Ratio. The full list is on the Harmony overview.
See it on a full report
Open the sample report to see every measurement, score and highlight on a real example.