EYE LEVEL&_reg; Interactive Shooting Glasses for prescription glasses. 4 in 1 lens system Optical insert for prescription glasses Shatterproof polycarbonate Interchangeable lens colours: Vermillion, Sodium Yellow, Orange, Clear and Grey with Silver Mirror Protective case EYE LEVEL Interactive Shooting Glasses - Find the target more accurately with these unique 4-in-1 shooting glasses which include an easy-to-use optical insert which is detachable for non-spectacle wearers. The optical insert is designed to fit your prescription size. Simply take the Interactive shooting glasss along to your optician and ask them to fit your prescription. The polycarbonate lenses are impact-resistant and interchangeable. Lens colours are vermillion, Sodium Yellow, Brown and Grey with Silver Mirror and conform to EN166-F. A protective case is included.