As I can tell:
Auto III SV: the latest and greatest"aspheric/atoric" individualized lens with a wide range of POW variables.
Auto II SV: (the same thing?)
Spectrum SV: a general individualized lens with limited/no POW variables.
So the way I'm playing it is using the Spectrum SV for ophthalmic front frames, and using the Auto III SV for wrap sunglasses.
But is the Auto II SV still out there? It costs significantly less than the III.
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