Originally Posted by
pomtzu
I can't figure this part - I don't see how they can properly do this. :confused: When you have bi-focals or progressives, the optician always measures where to position where the progression or bi-focal portion end, so that is doesn't interfere with the distance portion of the lens which is higher up. This is always done while you are wearing the frame, and they can mark and measure accordingly. How can this be done by mail order? I can see where it wouldn't be a problem with single vision lenses, but how to get it correct with the other lenses???
Inquiring minds want to know! :)