Variation of power located on the back surface is not a wearers’ advantage. No advantage for the opticians. It is an advantage for the manufacturers : less SF, less molds, ensuring to keep the manufacturing process. How about key hole effect? What is benefit front side PAL compare with backside pal
I have no idea why this post is directed at me. :confused:
Happy...................In Bali they consider you the positive force in the matter of progressivesQuote:
Originally Posted by Happylady
Iam sorry, i need information from you because i think you know a lot about essilor lenses. That's only statement for you, I just want to know your respon about that statement. I have seminar about Rodenstok lenses in one week, and they say their progressive are back side PAL better than Essilor PAL that i know is front side ( Comfort, panamic, Regular Physio ( not 360). That statement are from essilor marketing...should I beleive Them? Pls give me information about Benefit and bad thing Front side PAL VS Back side PALQuote:
Originally Posted by Happylady