I fully understand the concerns raised at the beginning of this thread. I also am affected by this minus five diopter business but in terms of the fact that my pre-lasik prescription was of that order.
I have discussed this with a number of optitians and opthalmologists all of whom agree that pre-op prescription is about as relevant as what colour of tie I wore in the 70s.
I have also had preliminary discussions with a lawyer who reckons the regulations are somewhat weak. It will be interesting to see how all this develops.