Hi
1.) Does anyone know how the addition effects on the center thickness on a lens?
how can i calculate the CT if i have an progressive lens??
single vision lenses i allready can calculate but how much do i have to add to the CT if i have an addition of 2.00??
2.) How much do i have to add on the edge thickness if i have cylinder??
like SPH -4.00 CYL - 2.00 Axe 80 DIA 60 Base 4.00 index 1.5
how much is my edge thickness on AXE 80 now???
thanx
mike
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