Do NOT guess – MEASURE !
Plot measurement on normative scales
1. Telorism (C)* (distance/separation of paired structures).
Hypertelorism – Normo … – Hypo …
2. MEASURE Palpebral Opening (A – B).
Narrow – Norm – Wide
3. Nasal tip to upper lip vermilion** distance (D).
* Telorism refers to a distance between paired structures.
**Vermilion – lips red mucosa (similar hue to a earth-worm or mercury sulfide known as cinnabar).