I agree with the others but want to say that the one thing I would not do is remove the glasses from any attraction if you cannot see without them. Half the fun on Disney attractions is the stuff all around you. So, take a strap, use it and then sit back and relax. But, if I can wear simple store bought sunglasses (non prescription) on Expedition Everest and Kali River Rapids on multiple occasions and still have those glasses, I wouldn't worry about it too much.