I just got some new glasses and thought I'd get some prescription sun
glasses for the first time. I was initially going to get some "regular"
smallish square frames with tinted glass, but my wife and the optician
convinced me that I need something bigger to keep more of the light out.
Finally I settled on some wrap-around Adidas "punksta" frames:
http://www.tennis-warehouse.com/descpageADIDAS-APSB.html

Two weeks later when it was time to pick the sunglasses up, I tried them on
and they didn't fit at all. After trying to convince me that they just
needed "adjusted", they finally admitted that they had been "flattened"
because they had put 4 base curve lenses in (they said that the frames were
supposed to take 6, but it's actually 8). They proceeded to say that it was
not possible to provide my prescription in higher than 4 base curve. My
prescription is -3.5. Is it true that it wouldn't work well? They said they
were going to see what they could do about it, which I took to mean more
"adjustments", i.e. bending the heck out of the frames. They have now called
again and want me to pick them up.

This is going to be around $250, so I will not be happy with something that
will not fit well. It was THEIR suggestion to use the Adidas frames, and if
there was going to be a problem I think they should have warned me before
ordering them, instead of trying to pretend that everything is fine when
it's obviously not. I had not heard the phrase "base curve" before, and I
don't think there's any reasonble way I could've known that there was going
to be a problem. What is your advice? Should I demand 8 base curve lenses?
Just refuse the sunglasses and go somewhere else? Or am I being
unreasonable?

Thanks so much,
Mark