duckie....sounds like someone I know....

A friend of mine has perscription water goggles, so I'm sure you can get perscription board/ski goggles.
Anon and Scott seem to make fairly wide frames, see if they have any over the glasses solutions, smith may too.
The bolle are spherical in shape/design so as duckie above said, fitting them over glasses may be a bit uncomfortable.
EDIT1:
http://www.smithoptics.com/Over-The-...tegory_14.html found after a quick search
EDIT2: price seems very reasonable