The features are an entry point
Traditional Mian Xiang often studies brows, eyes, nose, mouth and ears as an integrated set. Shape, proportion, vitality, coordination and change matter more than one isolated feature.
Dimensions of observation
Brows are viewed through direction and density; eyes through openness and expression; the nose through proportion; the mouth through form and closure; and ears through contour and position. These are cultural categories, not medical indicators.
Why scoring fails
Genetics, age, expression, lighting, lenses and habits affect appearance. One feature must be read with face shape, three regions, left-right relationships and current state, so fixed formulas create stereotypes.
Photographic conditions
Use natural light, a level camera, no strong filter and an unobstructed face; add side views when needed. Distinguish stable structure from temporary expression and acknowledge the limits of photographs.
Ethical boundary
Face reading must not diagnose disease or infer criminality, hiring ability or moral character. Medical, psychological and legal questions belong with qualified professionals.