How does add affect the corridor (for want of perhaps a better term). We're all aware a +2 add vs a +3 add in a PAL is going to have reduced channel...
So I've always wondered.... What is up with the W. Wollaston base-curve lens series? It gets mentioned in almost any base curve tutorial without any...
Labs have always, “Made as ordered”. You order a 60 pd with 10D of prism, you will (should) get 10D at 60mm. Even in the old days, we never differed...
So if I'm putting these (and other dotted up prism blanks and assuming I am blocking them) on a project-o-mark I'm decentering an extra 5 or 6mm in,...
Well, I'm ophthalmology and while yes, we mainly just deal with our own patients, I do get outside RXs and fill them. I am not sure why they come to...