If all is edged correctly with a PAL, then the PD should measure correctly? for instance, take a look at the pic below. It is a PAL and it's supposed...
Those tiny bubbles are annoying. One thing that has helped me is to have a little dropper of distilled water on-hand. Not sure if it helps more than...
Get a bowl, full of water. Clean the back side of the Rx lens. Mark Fresnel at prism poles with an indelible pens like a lens marker (towards outside...
Modern is a popular one. There are tons of cheap frame options out there. Previous employer used to carry lots of Europa product across 6 locations....