This section will give you an idea about Cylinder distribution on progressive lenses.
The Progressive umbilical line determines how the lens behaves in a region around this line, that we call Minkwitz zone.
Minkwitz zone does not depend neither on the PAL model or the design. Two lenses with the same umbilical profile will have exactly the same Minkwitz zone.
Outside the Minkwitz zone, the astigmatism can be almost distributed freely. We can concentrate it (the gradient and maximum level of unwanted astigmatism increases) or we can spread it, (the gradient and maximum level of unwanted astigmatism decreases).
For order a progressive lenses with less astigmatism distortion, you can check our related article of Customization of FreeFrom Lenses