The definition of Toroidal surface is mentioned here:

The Setup Tab > Editors Group (Setup Tab) > Lens Data Editor > Sequential Surfaces (lens data editor) > Toroidal

Toroidal surfaces are formed by defining a curve in the Y-Z plane, and then rotating this curve about an axis parallel to the Y axis and intersecting the Z axis. Toroids are defined using a base radius of curvature in the Y-Z plane, as well as a conic constant and polynomial aspheric coefficients.

Another way to verify, we can use the surface sag, the rotation R’s value is 0：

This is a trick to test some unfamiliar surface, we can use Surface sag and surface sag cross to test.