Add your prescription to any Smith goggles . The Smith GRX Prescription Goggle Adapter is universally compatible with all of our adult and youth models. It's a secure, comfortable and high performance prescription goggle solution. Tuned arms secure it into place, maintaining a full field of view and allowing for goggle lens interchangeability. The matte crystal frame has a barely-there look for distraction free vision, and large lenses maximize your Rx coverage. Frame bumpers stabilize the lenses and protect the inner goggle lens.