Good quality sunglasses make all the difference.
You are talking about protecting your eyes from more than an errant Lami-SNAP!(I can attest to Parkers' impact testing. He got pretty lucky on that one!)...You are protecting your eyes from UV and eye strain. Night vision is significantly impacted by not shielding your eyes properly.
I make a conscious effort to take care of my glasses...keep them in the case...use the right cleaning solution and cloth. Windex causes clouding! Paper towels and Kleenex cause scratches!
I buy premium(Maui Jim, Vuarnet, Ray-ban, now Action Optics) in polarized GLASS. You can pay alot for polycarbonate lenses and they just don't stand up if you really use them.
Good polarized lenses can really help you see structure under the glare of the water and really help your river fishing.
I just got Action Optics in all-hours brown and can use them on cloudy low-light conditions and they change to darker tint in bright light. Great investment in fishing optics.
Ted's has an excellent selection.
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If you leave things up to interpretation, there's no room to be right.