Facial anthropometry: direct measurements of the face
Quick facts
- Definition
- Direct measurement of distances and angles on a living face, using instruments.
- Instrument
- Caliper, spreading compass and tape.
- Difference
- Cephalometry uses X-rays; photogrammetry uses photos.
- Advantage
- Does not depend on the lens or the distance from the camera.
- Limit
- Depends on correct landmark placement and on the operator.
Facial anthropometry is the direct measurement of a living person's face using instruments such as a caliper and a compass. Distances between reference points (landmarks) are measured and, sometimes, angles, to describe proportions and compare them with references from the literature.
How does it differ from other methods?
| Method | How it measures | Notes |
|---|---|---|
| Anthropometry | Directly on the face | Avoids lens distortion |
| Cephalometry | Lateral X-ray | Shows the skeleton |
| Photogrammetry | Standardized photo | Depends on lens, distance and position |
Each answers different questions. For facial harmonization, combining clinical examination with standardized photos is usually enough for planning.
Which measurements are most used?
- Proportion of the facial thirds and the rule of fifths.
- Interpupillary distance and nose width, measured from the alare point.
- Facial index, which relates height to width.
- Distances between symmetry points, right and left.
How to apply it in the office?
Mark the points carefully, repeat the measurement to check it, and note the date and the instrument. In photos, always position the head the same way and keep the same distance from the camera. This allows the before and after to be compared with some consistency.
Also called: facial anthropometry, direct facial measurements.
Frequently asked questions
Do anthropometry and photo analysis give the same result?
Not necessarily. A photo suffers distortion from the lens, the distance and the head position. Direct measurement avoids some of these errors, but it requires technique and well-located points.