How to Create a design of a prescription surface of a multifocal lens and multifocal lens with such a prescription surface

In a method for creating a design of a prescription surface (T) of a multifocal lens (10), in particular for a progressive lens, are first first data (m Thereafter, additional sets of parameters can ((c Finally, the prescription surface values (z (u, v)) of the prescription surface at the first reference point (B