Presciption Sunglasses?

Just wondering if anyone has some advice or recommendations on Glasses.
I,m into Tri-focal glasses now for everyday use. Golfing I use regular UV sunglasses.
With the normal sunglasses I lose sight of the ball on the way down.
I think it's time for a pair of Golf Prescription Sun-Glasses.
Problem is Optomitrists are into selling Frame$, I need advice on an economical set.
:eye-poppi:golfing_b
I'm not looking for Optimitrist recommendations,
but rather specific's of the glasses you use & would recommend.

I use separate single vision glasses even though my prescription calls for bi-focals. For golf I use the distance vision prescription with transitions lenses and they work great. I also use them for driving and for other sports. I got thin frames that bend without breaking, so they have lasted forever (over 6 years now). Generally speaking your distance prescription should not need to be updated as often.

I think prescription polarized sunglasses might work better in very bright sunlight, but they may not work as well for driving or for indoor sports. I'm happy with my setup.

TKX for the reply.
Played Thursday afternoon, Humidex insane high.
Besides sweaty hands (Overgripping to prevent the Helicopter Special),
I noticed my glasses fogged when the breeze died down.
So I'm thinking Anti-fog, UV with a Distance Prescription.
The Transition is also something I need to look at.
Cloudy Day lenses Clear, Sunny Day lenses Dark a really good Option.
http://forum.ottawagolf.com/images/s...ye-popping.gifhttp://forum.ottawagolf.com/images/s...ing_banana.gif
Any other considerations I'm missing?