I used to cut this between two plano lenses just short of the bevel diameter and apply it to the flattest surface (albeit FT not applicable) also use...
Yes I have had plenty problem with Comfort Max, I do not dispense them anymore and went back to Comfort DRx and W2+ as my lower tier Varilux. Essilor...
In Introduction to Ophthalmic Optics (Meister and Sheedy) this is referred to as Prism by Obliquity, Systems for Ophthalmic Dispensing has a section...