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Note that some digital vendors will have their own rules for thicknesses, and they may over-ride the requested thickness from Rx-Universe.
Electronic Interfaces
Rx-Universe can receive a specified center thickness as part of an order file sent in GIF format.
CTHICK - specifies a particular center thickness
THNP - specifies the edge thickness of the thinnest point
Both can be included in an order file, and both will be respected, but THNP will be interpreted, in this case, as the desired minimum edge thickness. If the lens, when using CTHICK, has an edge thinner than THNP, then the thickness will be increased to respect BOTH requests.