As to the safty glasses for children, the safty glasses should be impact-resistant and safe. So you can find safety glasses for children made of industrial strength glass and impact resistant plastic. They do meet current eye protection standards. But nothing beats polycarbonate. It's the safest and most impact-resistant lens material. And yes, it's been used for astronaut helmet shields and space shuttle window shields. It's that strong.Besides lenses, you also can find frames of high-impact plastic or polycarb. Protective designs are available in goggles, wraps and shields-look for rubber padding to cushion the face even more. If you don't wear prescription lenses, you can find protective eyewear at your VSP doctor's office or at a sporting goods store.