I sent my Rx from my opthamologist into Action Optics.

In my prescription, in bifocal, in GLASS photochromic copper, wire aviator frames, $300.
My eyes, and my vision need the best optics that i can get.
Pricey ? Heavy ?
Yes
Worth it to me though.
Best quality sunglasses that I've ever had.
I've been wearing Rx polarized lenses since age 13, and now I'm 56.

The question really is...
What is your vision worth to you?

( and it is mostly true that you get what you pay for )

Greg