Prescription, so on all the time.  Oakley Prizm Golf.

Combining two things that to some extent imperfectly cancel each other out seems like a very weak reed to hang an argument on.    

Unless you know 1) what the numbers mean and 2) how to effect change, I wouldn't pay 32/hr for it.  That said, I use a launch monitor to help reinforce my feels based upon the numbers I get.  I'm no swing guru, but it works for me, and I love being able to practice the full swing at home in my garage with data I can trust.

Get the Oakleys with the golf specific lenses, leave em on all the time

Which is kind of what I did in the above, haha.