did the sbz search and now my eyes are really sore. couldn't really find comments on best tint and whether polarising is best. Tried disposable lenses and not for me. my main decision i think is whether to go for the goggle type or normal sunnie type. all comments appreciated.
Cruiser, dont go for the goggle type. I did first up, and it was a pain in the horse. Bloody things were the worst idea yet.
Fog up and all sorts of issues.
In the end I went prescription Polaroid
However going via the normal chain outlets wasn't good. In the end I was fed up with the malarky they dribbled, so went to a local shop that gave good service and knew what I wanted. Was a factor he was a surfer who used prescription as well.
Fitted the arms with a loop cord, that you drop over your head when putting them on, then one twist and back over the front. That way if they come off forward, or back they stay around neck. 
Forget the goggles.I went for the cheap option where you can get tinted goggles in increments for about $50 but have never been able to use them yet .Either water marks or fog obscure vision.
With prescription sunnies ( having lost some catapulting lately even though using a webbing tie 
) Im doing what someone here suggested & it works great.Get the optometrist to drill a hole in the end of each arm.Buy some of those plastic label tags from Woolies & just get the ring off each & chuck the rest. Thread the ring through each arm hole & then use normal glass ties.Thread the bit that usually goes over the end of the arms through the rings. Then make sure you tie the end of your wetsuit zip puller or similar to the glass ties so if they come off / over your head they are still attached to you.
Summary- glasses have rings to attach glass ties to . Attach glass ties to yourself..If you use normal glass holder ties directly onto the glasses there is always the chance theyll come off ( unless you wire them on ).
One disadvantage with this setup is the rings have to be aligned comfortably as they sit behind your ears as they would be uncomfortable otherwise & might be bit noticeable if you wear them all the time.If your sunnies are just for sailbaording or you have longish hair over your ears no hassles..
Have been using Barz optics for 10 years. I guess they are are a goggle type. I have no issues with them. Only wear them while sailing. They are pretty ugly..........
The Barz were about $400. Never had an issue with fogging, but they are not as comfortable as sunnies. Great polaroids though.
This will probably only interest those who need glasses...
Went the polaroid Bolle Fang 85% (not the 65%) and brown tint (not the grey) as suggested by the optom because a) i'm old and we lose certain colour response as we age b) highlights warm colours which suits my usual 4 - 6pm sailing time c) I can't pick the swells on those grey days when the sky and sea become one.
The Fang because it is low profile and hopefully will catch less wind and water.
ordered progressives rather than long distance only after he checked my normal sailing stance. I hadn't considered the angle of body lean and amount of head tilt - he was worried that too much lean would cause me to be looking through the reading section. Plus I will be able to use them in more situations like driving.
polaroid also offer better optics in either: distance (top section of the glasses)/ reading (bottom section / or dynamic (compromise - all over the optical section of the glasses). I chose distance for sport.
Getting 2mm holes drilled in arms to thread 2mm marlow string as cord
As far as my health fund was concerned, they would not pay out on normal sunnies but I claimed the lenses straight up on Hicaps and if I got a handwritten note on the receipt from the optom (even though I bought them at a sunnies shop) they would also pay on the frames.
hope all that helps anyone in the blind as a bat category
