PC impact resistance space piece: eccentric lenses are all made of PC, PC space is widely used in aviation equipment of a kind of advanced material, is the world's most can shock of the lens, it can prevent the lens broken when motion, the harm of glasses make sports safer, Is also the world's most thin lenses, super light high temperature, high optical transparency, resistance to impact and low birefringence, uv protection and so on six big features; Resistance to impact 12 times that of the resin lenses, glass lenses 60 times, can effectively cut off ultraviolet rays into 100% UV resistance, early is widely used in aircraft, bulletproof glass, the astronauts mask purposes