Can/should I wear my glasses white water rafting?

Fuck, I just thought of this. I am going white water rafting in the morning (grade 3 or 4 I believe) and am concerned about my glasses. I wear them all the time, and they were also expensive. Should I worry about them getting knocked off, is there any chance of that? I have never been rafting so I don’t know how rough things will be. Also if they will be covered in water the whole time, that would probably be annoying too. I have contacts, but they are old and absolutely kill my eyes anyhow regardless, so I don’t want to wear them unless I KNOW I should.

Just tell me it’ll be fine in glasses….no but really, will it? The only perk of contacts is that I could wear sunglasses. But my vision will be blurry all day, and my eyes will get sore….:\