If you buy a motorcycle with a windshield, it shouldn't be a problem. Even if your bike doesn't have a windshield, you could buy a full face plastic shield for under $10. I wear glasses, and my bike has a windshield. However, I also wear clip-on sunglasses over them when I ride. I feel that two layers of plastic are much safer than only one. My new glasses are polycarb lenses and aren't supposed to shatter. Even so, I still put my sunglasses over them. I never wear my face shield, because here in the Ozarks we have 100 degree temperatures almost daily now, and the face shield is just too hot.