I set the mark my self, almost all of frames have to be adjusted after the customer get them on,
so i can't believe that anything under 0.5 mm matters. and i can always adjust a little after the customers get them.

we only sell hi-end pals so maybe its because off that the tolerance for errors are bigger.

we sell 1.000 pairs of pals every year and i believe that there are about 20 customers that have complaints
mostly do to much + in the distance zone and some times during the edging process we make an honest mistake.

but i have never in my entire career, had a costumers that came in to my shop, saying something is wrong, and i discoverd
that the fitting of the lens was 0.2 mm off on the left eye and 0.1 mm off on the right.

btw we got a Zeiss RVT and uses it sometimes to impress customers that are used to that from there old optical shop.

like to hear what you do in your office

best regards

Peter