Originally Posted by
Robert Martellaro
Thank you.
I see that the inset is calculated for work distance as well as IPD, vertex distance, and Rx. I would expect to see that from a FBS PAL; there's no reason not to implement that calculation unless it's a low end design. After all, some of the premium semi-finished lenses have some degree of inset and corridor length optimization for base curve and add power.
A couple more questions if I may.
If we map a plano sphere +2.50 add PAL, and a +1.50 -3.00 x 45 PAL, many PAL design cylinder plots take on a significantly deformed appearance. Does the Digital Ray-Path® technology modify the PAL optics so that the intended PAL design is reasonably true across a very wide range of RXs and fitting parameters? If so, is it calculated in real-time?
WRT the distance, balanced, and near designs, could you describe the tradeoffs made when going from one design to another, specifically the distance and near zone widths and their associated corridor lengths.
I'll do that (Walman is my primary lab). I understand that it's hard to pin this down unless we know a little about the frame shape, size,and decentration, primarily with plus powers.
Best regards,
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