Harmony & facial ratios
One Eye Apart Test
1 min read · Updated October 4, 2026
The gap between your eyes compared with the width of one eye.
What it is
The one-eye-apart test asks whether the space between your two eyes is about the width of one eye. A value near 1 matches the traditional rule; higher means the eyes sit further apart, lower means closer together.
How it's measured
The gap is the distance between the two inner corners of the eyes. The eye width is taken from the inner corner to the end of the upper-lid hood and averaged over both eyes. The ratio is gap divided by eye width.
How it's read
Values close to 1 are read as well-spaced eyes. Wide-set eyes (higher) can look youthful and open; close-set eyes (lower) can look intense. Neither is a flaw on its own, and it is a soft rule rather than a hard one.
What affects it
Eye width depends on how open your eyes are and where the lid hood ends, so squinting, glasses or heavy lids change it. Look straight at the lens with relaxed, fully open eyes.
Related measurements
In the same group: Eye Aspect Ratio, Eye Separation Ratio and Eyebrow Tilt. 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.