Hail, paragons of wizardry and virtue! Would you please double check me?
Rx:
-0.25 +0.25 105 1.50D BI/6.00D BU 20/30-2
-5.00 +0.75 160 1.50D BI/6.00D BD 20/60
Add: +3.00
Line bifocals FT28
OS slab off
Raw seg measurements: 12.5/13.0
My bible tells me to adjust segs .3mm per diopter of vertical prism towards the apex, so ordinarily I’d order segs at 10.7/14.8 (or 11/15 and tap the nosepads up at dispense.)
Say the OS FT segment line shares the demarcation line the slab-off, then shouldn’t I leave that calculation alone?
Or do I need to be nervous that the image in the seg is getting some 4D of Base-Up treatment and I need to shove that OS seg back down to a 10.7/13.6 (or 11/14 with the bilateral nosepad adjustment?)
Or is it some arcane bit of quantum entanglement that gives me a whole new number in between?
Thanks for your help!
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