I am very concerned about this too. After getting all buckled in on Pony Express at Knott's Berry Farms, they told my family that we needed to put our glasses, for vision, not sunglasses, in our pockets. Mine wouldn't fit in my pockets, because my pockets were under the lap restraint. I had to get off the bike, put them in an open cubby that was already being used, walk back to the bike and get on without my glasses. Couldn't see squat the whole ride. I have bad vision. When I went back to find my glasses, someone had knocked them to the ground. Luckily, they weren't damaged. There was absolutely no signage saying this. I refuse to ride anything without my glasses again. I even wear them on water slides, with a strap; not chute slides. We will have to see what comes out of the reports of people riding. I am hoping they let us wear them with a strap. I don't wear a strap on any other coasters or rides, except RNRC. The shoulder harness tends to knock my glasses off my face. I have almost lost them twice; I had to grab them with my hands when they completely came off my face. I have no problems with the strap though. If I can't ride Tron, so be it.