There seems to be a new trend developing in the area of slab-offs. With the advent of new lathes and other generators, it seems as if the old way of doing a bi-centric grind is going away. My question is this....Has anybody noticed a drop in the quality of slab lenses when they are cut by one of these new generators? It seems to me to be a sub-standard way of doing it. The "blend" in the slab line creates a field of chaotic curves that would seem to me to be in a difficult place for a patient to adapt to. This seems similar to the unwanted "swim" associated with the chaotic curves of a progressive lens. Any thoughts on the subject???
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