If you really don't need glasses, why drop $200 on a perscription when any $25 pair will do just fine? You're just asking for trouble.
I have a pair of distance glasses tucked away in a crushproof glasses case, but I wear those cheap "Solar Shield" wrap-a-round glasses. The old folks wear them around Miami Beach.
Stylish? Maybe not, but they are 100% UV, and they completely cover the sides, brow and cheek... aint no UV getting in. I buy them in a rose/red color- it sets me aparat from the snowbird set and provides perfect wind/sun/spray protection. And- they're disposable if they scratch. You can wear them over your regular glasses, too. Great for snow skiing.
If you wear decent glasses with the springy temples as suggested above, be absolutely certain to lubricate them before and after and trip to the sea... a drop of light oil in each side. Not joking here.
Yes, you can get some style and UV protrection from any decent pair of $20 glasses, but do they cover the sides? (unless you get the leather/plastic mountaineering or trap shooter's side panel "blinders") That's the point. And if they get scratched... who cares?