GLOSSARY · ALL TERMS
Facial thirds & fifths, measured openly.
Thirds and fifths are the oldest proportion bands in facial analysis — horizontal thirds stacked from hairline to chin, vertical fifths spanned ear to ear. Here is what they are, which landmarks locate them, and what an Aureon report does with them.
What they are
Thirds divide the face horizontally: upper (hairline to brow), middle (brow to nose base), lower (nose base to chin). Fifths divide it vertically into five roughly equal widths across the face. They are descriptive reference bands, not grades — see also symmetry and canthal tilt.
Landmarks used
Hairline, brow line, nose base and chin for the thirds; outer face edges and eye corners for the fifths. Each boundary must be visible and landmarkable on a straight-on front photo — the overlay demo shows how each point is drawn.
What Aureon reports
The measured height or width of each band with per-reading reference status and a confidence label: reference-backed, exploratory, limited-by-photo, or unavailable. No composite score is built from the bands, ever.
What it does NOT mean
Unequal bands are not a flaw and not a beauty verdict. The bands describe where length sits, not whether a face is attractive — Aureon issues no attractiveness scores, and no single band determines anything on its own.
When unavailable
Hair covering the hairline, a tilted or turned head, cropping that cuts the chin or face edges, or heavy blur each void the bands they touch. Those bands come back unavailable for that photo — never estimated. Retake with the photo-quality guide.
Further reading: one clinical series found chin deviation in roughly three-quarters of asymmetric cases, pointing at the lower third (Facial Asymmetry—Demystifying the Entity).
THIRDS FAQ
Questions about thirds & fifths.
What are facial thirds and fifths?
Thirds divide the face horizontally into upper, middle and lower bands; fifths divide it vertically into five roughly equal widths. They are descriptive reference bands, not grades — no band being longer or shorter is a verdict on its own.
Do I need a special photo for thirds and fifths?
A straight-on front photo with a neutral expression, level head and fully visible hairline, brows, nose base and chin is enough. Hair over the hairline or a tilted head makes the affected bands unavailable rather than estimated.
What does Aureon report for thirds and fifths?
The measured height or width of each band with per-reading reference status and a confidence label. Bands that cannot be landmarked reliably are marked unavailable for that photo.
Good photos in, honest readings out.
Informational analysis only — not medical advice. More terms in the glossary.