Canthal Tilt Test
A free canthal tilt checker: upload a front-facing photo to measure your tilt in degrees and see whether it is positive, neutral, or negative.
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What Canthal Tilt Measures
Canthal tilt describes the angle of the axis running from the medial canthus, the inner corner of the eye, to the lateral canthus, the outer corner. Measured against a horizontal reference line, a positive angle means the outer corner sits higher than the inner corner, and a negative angle means it sits lower.
The measurement comes from periocular anthropometry, where inner and outer canthal distances are standard landmarks. Most published adult samples cluster slightly positive, but the spread across individuals and across ethnic groups is wide enough that no single number is a target.
Using It as a Canthal Tilt Calculator
The angle you get here is calculated from landmark positions rather than eyeballed against a drawn line, so it is repeatable in a way a manual estimate is not. Run the same photo twice and you get the same number.
What does move the result is the photo itself. Head tilt is the biggest factor: rotating your head a few degrees rotates the canthal axis with it. Camera height, lens distortion from a close selfie, squinting, and glasses frames that cut across the outer corner all shift the reading too. Every result carries a confidence score for exactly this reason, and a low score is a signal to retake rather than a verdict on your face.
Positive, Neutral, and Negative Canthal Tilt
The three categories are conventional labels for bands along a continuum, not distinct types. An angle sitting near a boundary can land either side of it between two photos.
| Category | Typical Angle | What It Looks Like |
|---|---|---|
| Positive | Above roughly +2° | The outer corner (lateral canthus) sits higher than the inner corner, giving the eye an upward slant. |
| Neutral | Roughly -2° to +2° | Inner and outer corners sit at close to the same height, so the eye axis reads as level. |
| Negative | Below roughly -2° | The outer corner sits lower than the inner corner, giving the eye a downward slant. |
Canthal tilt is fixed by orbital bone structure and the soft tissue anchoring the outer corner. It is not something posture, exercise, or skincare changes, and it is only one of many features that shape how a face reads.
FAQs
Common questions about the canthal tilt test and how to read your angle.
References
- Periocular anthropometry and canthal measurements (PubMed):Anthropometric Analysis of the Periocular Region
- Ocular adnexal aesthetic proportions review (PubMed):Periorbital Aesthetic Analysis