I wear prescription sunglasses with croakies. I've got some Anti-fog goop I apply to the inside before I put on. I've been thinking about also applying Rain-x to the outside to cut down water droplets. But the drops don't really get in the way that much.
Fog is a big problem and the stuff I have works well as long as I remember to apply every time. I don't know the name of it as the label has come off. It comes in a small bottle and is blue.
I've also moved towards being a little colder on the river to cut down on the temp. difference.
The sunglasses make boating at dusk harder. In fact this year we were on the Big T. late and it got to the point I couldn't see anything. I had to drop the glasses down and just follow the red boat in front of me and hope for the best.
My glasses are polarized so I can see through the sun glare and have a much better view of the river.
They also cut down on the eye flush when going through waves/holes.
Oh yeah and I can see clearly down river, so there's that.
All in all I don't think I could boat (or boat harder stuff) without them.
You ARE a soul, you HAVE a body.