Placed on the lip
The lip outline is longer and smoother than the corner, so the point slides down it.
Point · Sn
Subnasale (Sn)
Subnasale: where the columella meets the upper lip.
At Beginner a placement counts as found within 2.1 mm of the reviewed reading.
How to find it
Press a step to be shown it on the ceph.
Common errors
Each figure is the reviewed reading of Subnasale (Sn) and a typical miss, on the same ceph, at the distance the mistake usually goes.
Placed at the nostril shadow
The nostril reads as a dark notch just behind the true corner and looks like the junction on a low-contrast ceph.
Used in
3 measurements are built on it. Miss it, and every one of them moves.
Your record
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