That's what I did when I bought sunglasses last year, when I had to get bifocals.

I have always liked Rayban Wayfarers, so I got a pair at the local Lenscrafters (during a 50% discount sale) and had them fitted with prescription lenses, including bifocals.

It is awfully nice to be able to walk on the beach without squinting, and then to sit down and read for bit, with the text being nice and clear.