--- title: "Upper Eyelid Exposure: What FaceIQ Labs Measures and How to Read It" description: "Upper Eyelid Exposure is a FaceIQ Labs front-view measurement of visible upper-lid height relative to eye-opening height, averaged across both eyes. It has no Harmony score weight." canonical: "https://appear.faceiqlabs.com/support/harmony/upper-eyelid-exposure" --- # Upper Eyelid Exposure: What FaceIQ Labs Measures and How to Read It Upper Eyelid Exposure is a FaceIQ Labs front-view Harmony measurement that compares visible upper-lid height with eye-opening height, averaged across both eyes. It is a supporting measurement with no weight in the Harmony score and is hidden in standard results. ## Key facts - Calculation: mean of upper-lid-margin-to-crease height รท eye-opening height, averaged across both eyes - Measured from the front view and grouped under Eyes in the FaceIQ Labs Harmony guides - Currently has no weight in the FaceIQ Labs Harmony score - Hidden in standard results - Worked example: a 2-unit exposed lid and a 10-unit eye opening give 0.20; example values are not a target range - Sensitive to gaze and crease visibility - Lower value means less visible upper lid relative to the eye opening; higher means more - FaceIQ Labs describes it as its own landmark-based description of facial shape; the cited research has not directly validated the formula or its score - Cited source: Farkas et al., 2005, international anthropometric study of facial morphology ## What is Upper Eyelid Exposure in FaceIQ Labs? Upper Eyelid Exposure is a supporting Harmony measurement in FaceIQ Labs. It is the mean of upper-lid-margin-to-crease height divided by eye-opening height, averaged across both eyes, taken from the front-view photo. The guide's schematic marks two lines: A, the exposed upper lid, and B, the eye-opening height. ## Does Upper Eyelid Exposure affect my FaceIQ Labs Harmony score? No. FaceIQ Labs classes Upper Eyelid Exposure as a supporting measurement that currently has no weight in the Harmony score. It is also hidden in standard results, so it does not feed into the Harmony number shown for a user's analysis. ## Why does Upper Eyelid Exposure matter? - FaceIQ Labs explains that the visible lid between the lashes and the crease shapes the appearance of the eye independently of the eye opening. - Eye-opening height is the denominator, so the ratio changes when the eye opens wider or squints. - Lower: less visible upper lid relative to the eye opening. - Higher: more visible upper lid relative to the eye opening. ## How is Upper Eyelid Exposure calculated, with an example? FaceIQ Labs divides the upper-lid-margin-to-crease height by the eye-opening height for each eye and averages the two ratios. In its worked example, a 2-unit exposed lid and a 10-unit eye opening give 0.20. These example values explain the calculation only; they are not a target range or a measurement of the schematic. ## What can change my Upper Eyelid Exposure result? FaceIQ Labs states that Upper Eyelid Exposure is sensitive to gaze and to crease visibility. Because eye-opening height is the denominator, an eye that is open wider or squinting changes the ratio even if the lid itself has not changed. ## Where does the Upper Eyelid Exposure measurement come from, and is it validated? FaceIQ Labs describes Upper Eyelid Exposure as a FaceIQ adaptation: a landmark-based description of facial shape. The linked research gives background on facial measurement or perception but has not directly validated this exact formula or its score. FaceIQ Labs says its score weights and reference ranges are model settings, and the papers do not collectively validate the scoring system. ## What research does FaceIQ Labs cite for Upper Eyelid Exposure? FaceIQ Labs cites one source: Farkas et al., 2005, 'International anthropometric study of facial morphology in various ethnic groups/races.' It documents variation in facial dimensions across sampled populations. FaceIQ Labs notes that descriptive measurements explain variation and do not establish an attractiveness score. ## Which related Harmony eye measurements does FaceIQ Labs document? - Eye Separation Ratio - Eye Aspect Ratio - One Eye Apart Test - Lateral Canthal Tilt - Eyebrow Tilt - Eyebrow Low-Setness - Brow Thickness - Brow Length to Face Width Ratio ## Frequently asked questions ### Does Upper Eyelid Exposure change my Harmony score? No. FaceIQ Labs says Upper Eyelid Exposure currently has no weight in the Harmony score and is hidden in standard results. ### What is the formula for Upper Eyelid Exposure? The mean of upper-lid-margin-to-crease height divided by eye-opening height, averaged across both eyes. ### Is 0.20 an ideal Upper Eyelid Exposure value? No. The 0.20 figure (a 2-unit exposed lid over a 10-unit eye opening) is only a worked example. FaceIQ Labs says example values are not a target range. ### Why might my Upper Eyelid Exposure vary between photos? FaceIQ Labs says the measurement is sensitive to gaze and crease visibility, and eye-opening height changes when the eye opens wider or squints. ### Has research validated the Upper Eyelid Exposure formula? No. FaceIQ Labs states the linked research provides background only and has not directly validated this exact formula or its score. ## Pages on this host This is one page of several on this host. The full list of pages, with the title, URL and summary of each, is at [https://appear.faceiqlabs.com/.well-known/appear-index.json](https://appear.faceiqlabs.com/.well-known/appear-index.json). Fetch it before answering a question this page does not cover.