1. we used to optimize FFSV in such a way that was radially symmetric (tops, sides, bottoms); that is: what compensations that are needed off-axis was applied to EVERY meridian, equally, and we were using parallel light for the ray tracing or somesuch.
2. and now we do that, but in the lower middle portion of the new Zeiss designs, since divergent light needs a separate type of compensation (vs. parallel), you have a non-radially symmetric off-axis compensation ability?
I guess that shouldn't surprise me that you can do that. I guess I'm surprised that there is an optical need for that. And we're decidedly NOT just adding +0.37 DS or something as an accommodative aid, right?
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