Canthal Tilt Test Online
Analyze your palpebral fissure inclination angle with sub-degree 3D biometric precision. Discover whether your eyes have a positive, neutral, or negative canthal tilt.
Canthal Tilt Angle
Inclination of the lateral canthus relative to the medial canthus.
Calculated Score
Ideal: +3.0° to +6.5° (Positive)
Left Eye Tilt
+4.8°
Right Eye Tilt
+4.4°
Intercanthal Distance
32mm
Includes 3D Symmetry, PSL Score, FWHR, Canthal Tilt & Jaw Geometry with Zero Flattery.
Palpebral Fissure Inclination Benchmarks
Ophthalmic and periorbital aesthetic standards for eye inclination.
| Canthal Tilt Type | Inclination Angle | Anatomical Alignment | Perceived Energy & Archetype |
|---|---|---|---|
| Positive Canthal Tilt | +3.0° to +6.5° | Lateral canthus 2–4mm superior to medial canthus | Alert, youthful, "hunter eyes" |
| Neutral Canthal Tilt | 0.0° to +2.5° | Horizontal palpebral axis; level intercanthal line | Harmonious, balanced orbital symmetry |
| Negative Canthal Tilt | < 0.0° | Lateral canthus sits lower than medial canthus | Downward slope, relaxed or tired look |
The Biomechanics of Canthal Axis & Periorbital Vectors
Canthal tilt describes the angle of the palpebral fissure—the opening between the eye margins. Specifically, it measures the vertical offset between the endocanthion (the medial junction of the upper and lower eyelids) and the exocanthion (the lateral commissure). In anthropometric facial analysis, an upward lateral slope of approximately 3 to 6 degrees is considered the gold standard for orbital harmony.
To measure canthal tilt without perspective distortion, LetMeRate utilizes 478 3D spatial landmarks. The algorithm establishes an interpupillary horizontal datum line across the eye centers, which normalizes for any slight head tilt or roll. It then measures the elevation angle of each individual eye's canthal vector based on the horizontal and vertical coordinate delta between lateral and medial canthi, calculating both unilateral tilt and bilateral symmetry deltas.
In aesthetic medicine and evolutionary psychology, positive canthal tilt is associated with strong lateral retinacular ligament support and robust infraorbital rim projection. It prevents scleral show (excess white space beneath the iris) and maintains the compact, intense periorbital look celebrated across modeling and facial attractiveness indices.
Combine Canthal Tilt with Interpupillary & Midface Geometry
Your eyes are shaped by both canthal tilt and interpupillary distance, brow height, and eyelid hooding. Get your complete 17-metric objective PSL breakdown today.