FACIAL
OPTIMIZATION
ANALYSIS
QUANTITATIVE AESTHETIC ASSESSMENT PROTOCOL
01. PHILOSOPHY
The Bio.Metric system is based on the PSL (Pure Scientific Looks) methodology, a data-driven approach to facial aesthetics. Unlike subjective ratings, PSL relies on measurable geometric ratios, angles, and proportions that have been evolutionarily linked to health, genetic fitness, and attractiveness.
Our algorithm uses a Hybrid Scoring Engine that combines two independent analysis layers:
- Geometric Layer (User Score): Calculates strict mathematical ratios (e.g., FWHR, Canthal Tilt) from the landmarks you place. This layer enforces hard limits for symmetry and proportion.
- AI Structural Layer (Adjustment): A specialized "Geometric Analysis Engine" evaluates the 3D bone structure, harmony, and overall proportional balance that raw math might miss.
The final score is a weighted synthesis of these two layers, ensuring that "God-tier" faces (like Henry Cavill) are recognized even if they deviate slightly from strict mathematical averages.
02. KEY METRICS
FWHR (Facial Width-to-Height Ratio)
The single most sexually dimorphic trait. Calculated by dividing the bizygomatic width (cheekbones) by the midface height (brow to lip). Higher ratios (>1.90) are associated with testosterone, dominance, and robusticity.
Canthal Tilt
The angle of the eye axis. A positive tilt (medial canthus lower than lateral canthus) creates a "hunter" eye aesthetic, signaling alertness and youth. Neutral or negative tilts are associated with a tired or prey-like appearance.
Midface Ratio
The compactness of the face. A compact midface (approx 33-35% of total facial height) is crucial for facial harmony. Long midfaces can disrupt the balance of features.
Facial Thirds
The vertical balance of the face, divided into upper (hairline to glabella), middle (glabella to subnasale), and lower (subnasale to menton) thirds. Ideal faces have nearly equal thirds (33.3% each).
Eye Spacing Ratio (ESR)
The ratio of the intercanthal distance (space between eyes) to the width of the eyes themselves. An ideal ratio is ~1.0 (one eye width apart). Values < 1.0 indicate close-set eyes; > 1.0 indicate wide-set eyes.
Jaw-to-Cheek Ratio
Measures the width of the jaw (gonions) relative to the cheekbones (zygions). A ratio closer to 1.0 indicates a square, masculine jawline. Lower ratios indicate a tapered or V-shaped jaw.
Chin-to-Philtrum Ratio
The ratio of the chin height to the philtrum length. A compact philtrum with a taller chin is generally preferred (Ratio ~2.0-2.25). Long philtrums are a common sign of facial aging or disproportion.
Screening Layer
Before scoring, every face passes through a strict screening layer. Severe asymmetry (>20% deviation), extreme eye spacing ratios, or significant jaw discrepancies will trigger a "Hard Fail," capping the score at 1.0 regardless of other features.
03. THE SCORING SCALE
The PSL scale follows a normal distribution (bell curve). Hover over the curve below to explore the statistical rarity of each tier.
| PSL | Percentile Range | Population Share | Interpretation |
|---|---|---|---|
| 1 | P < 2.5% | ~2.5% | Very low-tier structure |
| 2 | 2.5% ≤ P < 16% | ~13.5% | Clearly below average |
| 3 | 16% ≤ P < 37% | ~21% | Slightly below average |
| 4 | 37% ≤ P < 63% | ~26% | Average |
| 5 | 63% ≤ P < 84% | ~21% | Above average |
| 6 | 84% ≤ P < 97.5% | ~13.5% | Very good, rare |
| 7 | 97.5% ≤ P < 99.9% | ~0.2% - 0.3% | Exceptional |
| 8 | P ≥ 99.9% | ≤ 0.1% | Theoretical / near-perfect |