oh... isnt the groove to be cut supposed to be standard depth? do you mean that different nylon threads are being used, thus the there are different thickness of the nylon, that is why the depth of grooves varies? Otherwise, if the same kind of nylon being used for all the frames, aren't the depth in the groove the same? Y shd machine set some to be deeper & some to be shallow?
Ofcos cosmetically it isnt really that much of a concern. im just afraid the nylon will shift out.
Most of the frames i saw the nylon usually do not flush with the edge, but always a little protruding out. I suppose it's not that easy for the lens to fall off from the nylon? i tried pulling the nylon out from the lens but it didnt budge. But if i pull the frame part, it moved a little.
No , the groove is not standard depth. nylon string also got thick and thin but most i believe are of certain size. The reason why there are different depth is because of different manufactures. but i believe most of are certain depth.
if you are free, go to the optical shops and look at the rimlon frames. you will notice the nylon will sit flush with the edges of the lens.
i think you should not worry yourself with all the technicalities as long as the frames look nice and sit comfortably on your face and you can see clearly withou any problems.
