What Is the One Eye Apart Test in FaceIQ Labs' Harmony Analysis?
FaceIQ Labs' One Eye Apart Test is a front-view Harmony measurement for the eyes. It divides the gap between the inner eye corners by the average inner-corner-to-outer-hood span of the eye region. Below 1 means the gap is smaller than the reference eye width; above 1 means it is larger.
Key facts
- Calculation: inner-corner gap รท average inner-corner-to-outer-hood span.
- A result below 1 means the gap is smaller than the reference eye width; above 1 means it is larger.
- Worked example: a 30-unit gap with a 30-unit average eye span gives 1.0; a 33-unit gap with the same span gives 1.1.
- FaceIQ Labs states the example values only explain the calculation and are not a target range.
- The measurement does not use pupils; eyelid-hood endpoints and true outer eye corners are different landmarks.
- Unlike Eye Separation Ratio, which compares the gap with whole face width, it compares the gap with the eyes themselves.
- The one-eye-width gap is a classical facial canon; FaceIQ Labs cites Farkas et al. (1985).
- FaceIQ Labs says its score weights and reference ranges are model settings, and the cited papers do not collectively validate them.
- It is a front-view eye measurement in the FaceIQ Labs Harmony guides.
What does the One Eye Apart Test measure?
FaceIQ Labs' One Eye Apart Test measures the gap between the inner corners of the eyes and compares it with the average width of the eye region. The calculation is the inner-corner gap divided by the average inner-corner-to-outer-hood span. It is a front-view Harmony measurement focused on the eyes.
How do I read my One Eye Apart Test result?
- In FaceIQ Labs' One Eye Apart Test, a result below 1 means the gap between the inner eye corners is smaller than the reference eye width.
- A result above 1 means the gap is larger than the reference eye width.
- Example: a 30-unit inner-eye gap and a 30-unit average eye span give 1.0.
- Example: a 33-unit gap with the same 30-unit span gives 1.1.
- FaceIQ Labs states the example values only explain the calculation; they are not a target range and are not measurements of its schematic.
Which landmarks does the One Eye Apart Test use?
FaceIQ Labs' One Eye Apart Test uses the inner eye corners for the gap and the outer eyelid-hood endpoints for the width of the eye region. It does not use pupils for the gap. Eyelid-hood endpoints differ from true outer eye corners, so the denominator may differ from the outer canthus landmarks some studies use.
How is the One Eye Apart Test different from Eye Separation Ratio?
FaceIQ Labs' One Eye Apart Test compares the inner-eye gap with the eyes themselves, while its Eye Separation Ratio compares the eye gap with the whole face width. The One Eye Apart Test therefore gives a local spacing comparison, relating the gap to the size of the eye region rather than to the face.
Where does the One Eye Apart Test idea come from?
The one-eye-width gap is a classical facial proportion canon. FaceIQ Labs cites Farkas et al. (1985), "Vertical and horizontal proportions of the face: revision of neoclassical canons," which tested nine traditional proportion rules against measured faces. FaceIQ Labs notes classical rules are not universal targets, and the paper does not validate its scoring system.
How does the One Eye Apart Test fit into the FaceIQ Labs Harmony pillar?
FaceIQ Labs' One Eye Apart Test is one of the front-view eye measurements in its Harmony guides. Harmony is one of four scored pillars, alongside Angularity, Dimorphism and Features, and it compares 70+ facial ratios and angles to ideal ranges adjusted for gender and ethnicity. FaceIQ Labs describes its score weights and reference ranges as model settings.
Frequently asked questions
Is a One Eye Apart Test result of exactly 1.0 the ideal target?
FaceIQ Labs treats 1.0 as the point where the inner-eye gap equals the reference eye-region width; below 1 is smaller and above 1 is larger. Its example values, including 1.0 and 1.1, only explain the calculation and are not presented as a target range.
Does the One Eye Apart Test use the pupils to measure the eye gap?
No. FaceIQ Labs says not to use pupils for the gap. The measurement relies on the inner eye corners and the outer eyelid-hood endpoints, which are different landmarks from the true outer eye corners.
Does the Farkas et al. 1985 study validate FaceIQ Labs' scoring?
No. FaceIQ Labs says its cited sources explain history or related evidence, and that its score weights and reference ranges are model settings that these papers do not collectively validate.
Why might my result differ from a published study's eye measurement?
FaceIQ Labs uses outer eyelid-hood endpoints in the denominator, which may differ from the outer canthus landmarks a study uses. The two are different landmarks.