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Thanks a bunch you are Awesome!!!

on sv lenses does the pa value compensate for the oc to be on the 180 or should it be blocked like the seg height of a progressive?

if the lenses have ar use tape it sticks to the in markings and pulls them off the lens. The problem with poly started to become big when they made poly opticaly better mainly for the use of blu-ray...

is the reason that transitions work differently in different temps because the molecules are expanded and cant open as much in the hotter temps. but in cold weather they are contracted giving more...

vanni is imported by 3 companies the only one i know of is designer optical.

I need some scientific information for why transitions work and why they wont work in certain situations like extreme heat.