In the past I have worn the Night and Day contacts. I lost several on the river and never really liked paddling with them. Now I just wear an old pair of glasses with a teather to be sure I do not lose them. The theather is loose, but it's extremely rare that I've needed it. I've been through some pretty good class IV thashings and my glasses stayed right where they should be. There is a bit of a fogging problem on cloudy days in cold water, but a quick splash to the face clears that up. Water spots on the lenses can be annoying, but not as bad as trying to recenter a contact that has fushed under your eyelid just before the crux move of whatever you're running. Yeah, boating with vision problems is a hassle, but it's still better than not boating at all. 8)