We have a patient whos' doctor has prescribed combined prism in both eyes with a slab-off. Patient is currently wearing a progressive hi index lens.
Rx: od: +.75-.50x145 4bd 4bo
os: -4.00-1.50x180 3bu 4 bo
+2.75 add ou


Will a slab-off change prism in a progressive(in lft eye)????