ddstr
Iron
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I made this half asleep, so don't flame me if there are some mistakes.
Part 1: Horizontal & Frontal Facial Harmony Ratios
1. Eye Separation Ratio (ESR)
- Formula: Interpupillary Distance ÷ Bizygomatic Width
- European / MENA: 0.44 – 0.46 (Balanced orbital spacing on a mesocephalic framework).
- East / Southeast Asian: 0.41 – 0.43 (Lower ratio driven by a significantly wider, laterally flaring zygomatic width).
- African / Indigenous: 0.44 – 0.48 (Wider absolute orbital dimensions scale proportionately with midface breadth).
2. Facial Width to Height Ratio (FWHR)
- Formula: Bizygomatic Width ÷ Upper Facial Height (Eyebrow to Upper Lip)
- European / MENA: 1.70 – 1.85 (Leaner, more vertically elongated facial structures).
- East / Southeast Asian: 1.90 – 2.15 (Broader, high-set cheekbones expand this index horizontally).
- African / Indigenous: 1.75 – 1.95 (Highly variable; well-balanced vertical-to-horizontal distribution).
3. Total Facial Width to Height Ratio
- Formula: Total Facial Height (Hairline to Chin) ÷ Bizygomatic Width
- European / MENA: 1.35 – 1.45 (Leptoprosopic index; distinctly narrow, long-faced architecture).
- East / Southeast Asian: 1.25 – 1.33 (Brachycephalic index; compact, wider frontal geometry).
- African / Indigenous: 1.30 – 1.38 (Mesocephalic median baseline values).
- Formula: Jaw Width (at mouth line) ÷ Bizygomatic Width × 100
- European / MENA: 83% – 88% (Highly tapered lower face transitioning into a narrow chin base).
- East / Southeast Asian: 90% – 96% (Wide bigonial flare that closely matches cheekbone width).
- African / Indigenous: 86% – 91% (Strong lateral jaw angularity matching a broad midface).
5. Bitemporal-to-Jaw Width Ratio
- Formula: Forehead Width ÷ Bigonial Jaw Width
- European / MENA: 0.95 – 1.02 (Near-equal width keeps the temporal line balanced with the jaw frame).
- East / Southeast Asian: 1.02 – 1.08 (Slightly wider forehead taper to match a prominent jaw).
- African / Indigenous: 0.96 – 1.04 (Square, uniform frontal block architecture).
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Part 2: Vertical Facial Thirds & Segment Proportions
6. Total Facial Thirds Distribution
- Formula: Forehead Height ÷ Midface Height ÷ Lower Face Height
- European: 33.3% : 33.3% : 33.3% (Classical equal distribution archetype).
- East / Southeast Asian: 34% : 34% : 32% (Slight midface dominance with a shorter lower skeletal third).
- African: 32% : 32% : 36% (Elongated lower third driven by alveolar/dental arch projection).
- MENA / Indigenous: 32% : 34% : 34% (Slightly elongated lower two-thirds framework).
7. Upper to Lower Face Height Ratio
- Formula: Upper Facial Height ÷ Lower Facial Height
- European / MENA: 0.90 – 1.00 (Lower facial part is slightly longer to maintain lower jaw prominence).
- East / Southeast Asian: 1.00 – 1.08 (Upper/midface height slightly exceeds lower jaw length).
- African / Indigenous: 0.85 – 0.95 (Strong lower face dominance).
8. Forehead Height Ratio
- Formula: Hairline-to-Brow Height ÷ Total Facial Height
- Global Baseline: 0.31 – 0.34 across all populations. Deviations above 0.36 typically indicate hairline recession rather than underlying skeletal defects.
9. Chin to Philtrum Ratio
- Formula: Lower Lip-to-Chin Height ÷ Philtrum Height (Base of Nose to Upper Lip)
- European / MENA: 2.10 – 2.40 (A taller vertical chin bone anchors the profile).
- East / Southeast Asian: 1.85 – 2.10 (Naturally shorter vertical mandibular symphysis height).
- African / Indigenous: 2.00 – 2.30 (Highly variable; heavily influenced by lip tissue thickness).
10. Lower Third Internal Proportions
- Formula: (Nose-to-Lip Line Distance ÷ Lip Line-to-Chin Distance) × 100
- European / MENA: 31% – 35% (Short upper lip space relative to absolute chin drop).
- East / Southeast Asian: 36% – 42% (A shorter vertical chin bone increases this internal percentage).
- African / Indigenous: 33% – 38% (Balanced soft tissue spacing).
Part 3: Orbital (Eye) & Eyebrow Metrics
11. Eye Spacing Ratio (Intercanthal Index)
- Formula: Distance Between Inner Corners ÷ Palpebral Fissure Length (One Eye Width)
- European / MENA: 0.95 – 1.04 (Strict "one-eye-width apart" rule applies safely here).
- East / Southeast Asian: 1.05 – 1.18 (Epicanthic fold presence expands inner eye distance).
- African / Indigenous: 1.05 – 1.22 (Naturally wider intercanthal baseline coordinates).
12. Eye Aspect Ratio
- Formula: Horizontal Eye Length ÷ Vertical Eye Height
- European / MENA: 2.9 – 3.4 (Classic almond-shaped, balanced horizontal-to-vertical aperture).
- East / Southeast Asian: 3.5 – 4.0+ (Significantly elongated, narrower vertical eye openings).
- African / Indigenous: 2.5 – 3.0 (Vertically rounder, more open orbital look).
13. Canthal Tilt
- Formula: Angulation from Inner Canthus to Outer Canthus
- European / African: +2° to +5° (Slight, positive upward inclination).
- East / Southeast Asian: +5° to +9° (Distinct upward slant matching native orbital anatomy).
- MENA / Indigenous: +3° to +6° (Consistently positive, clean upward sweep).
14. Eyebrow Tilt
- Formula: Angulation of the Medial Brow to the Lateral Tail
- European / MENA: 6° – 12° (Dynamic, upwardly tracking brow ridges; higher in females).
- East / Southeast Asian: 0° – 5° (Straighter, more horizontal brow architectures dominate).
- African / Indigenous: 4° – 9° (Low-set, heavily protected supraorbital bone alignment).
15. Upper Eyelid Exposure (UEE)
- Anatomical Rule: Determined by supraorbital rim thickness and fat padding.
- European: Minimal to Moderate / visible exposure is common.
- East Asian: Zero to Micro-exposure / due to the low-set brow and single-eyelid/epicanthic anatomy.
- African / MENA: Minimal / visibility tightly locked down by forward-grown brow ridges.
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Part 4: Profile, Mandibular Growth & Jaw Angulation
16. The Gonial Angle
- Anatomy: Angle between the Mandibular Body and Ramus
- European: Men: 115° – 125° | Women: 120° – 130° (Sharp, highly defined jaw corner).
- East / Southeast Asian: Men: 122° – 132° | Women: 125° – 135° (Flatter, softer angle; balanced by jaw width).
- African / MENA: Men: 118° – 126° | Women: 122° – 132° (Clean, highly angular jawlines).
17. Frontal Jaw Angle
- Anatomy: Frontal taper of the jawlines meeting at the chin tip
- European / MENA: 84° – 92° (Deep, highly tapered lower third structure).
- East / Southeast Asian: 92° – 102° (Blunter, more squared or flat frontal silhouette).
- African / Indigenous: 88% – 95% (Robust, structurally wide mandibular profile).
18. Ramus-to-Mandible Ratio
- Anatomical Formula: Vertical Ramus Length : Horizontal Mandibular Body Length
- Global Skeletal Goal: 5 : 7 to 5 : 7.5 (Universal threshold for strong forward jaw growth across all races; avoids a recessed or backward-rotating chin).
19. Mentocervical Angle
- Anatomy: Glabella-to-Pogonion line crossing the submental neck line
- European / MENA: 80° – 90° (Crisp, sharp jaw-to-neck definition).
- East / Southeast Asian: 85° – 95° (Slightly softer angle due to a shorter mandibular body).
- African: 90° – 100° (Naturally more obtuse due to forward-set dental structures and neck muscle attachments).
20. Facial Convexity Angle (Glabella - Subnasale - Pogonion)
- Anatomy: General skeletal curvature of the side profile
- European: Men: 165° – 175° | Women: 170° – 180° (Straighter, orthognathic alignment).
- East Asian / Indigenous: Men: 160° – 170° | Women: 165° – 175° (More convex due to mild lower jaw stepping).
- African: 155° – 165° (Highly convex; natural result of healthy bimaxillary protrusion).
21. ANB Angle
- Anatomy: Skeletal relationship between the upper jaw (Maxilla) and lower jaw (Mandible)
- European / MENA: 1° – 4° (Standard Class I skeletal baseline).
- East Asian: 3° – 6° (Slightly increased variance; higher frequency of minor Class II or Class III curves).
- African: 4° – 8° (Naturally wider angle to accommodate forward jaw positioning).
22. Chin Projection Line
- Anatomy: Position of the chin point relative to a line dropped from the nose tip to the upper lip.
- European / MENA: Sits 1–3mm behind the vertical line.
- East Asian: Sits 3–5mm behind the line (more retrognathic tendency is standard).
- African: Sits directly on or slightly ahead of the line due to forward skeletal development.
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Part 5: Midface, Nasal & Lip Harmonization
23. Midface Ratio
- Formula: Interpupillary Distance ÷ Midface Height (Nasion to Upper Lip)
- European / African: 0.97 – 1.06 (Highly balanced horizontal-to-vertical midface segment).
- East / Southeast Asian: 1.06 – 1.15 (Higher ratio; driven by a physically shorter midface length).
- MENA: 0.90 – 0.96 (Lower ratio; vertically long midfaces are a standard regional trait).
24. Mouth to Nose Width Ratio
- Formula: Total Mouth Width ÷ Interalar (Nasal Base) Width
- European / MENA: 1.42 – 1.61 (Narrower nose bases cause the mouth to appear much wider).
- East / Southeast Asian: 1.30 – 1.42 (Moderate nose width scales evenly with mouth proportions).
- African / Indigenous: 1.15 – 1.28 (A wide nasal base combined with full lips creates a distinct, completely balanced 1.20 normal baseline).
25. Lower Lip to Upper Lip Height Ratio
- Formula: Vertical Height of Lower Lip ÷ Vertical Height of Upper Lip
- European / MENA: 1.40 – 1.65 (Distinct lower-lip thickness dominance).
- East / Southeast Asian: 1.20 – 1.40 (More uniform, balanced tissue distribution).
- African: 1.00 – 1.15 (Near-perfect 1:1 equal thickness split; provides structural support for bimaxillary skeletal structures).
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