... ). Sixth, the seven-story: Anti-shock reinforced layer, provide a good toughness, impact resistance. Eighth, the nine-story: polarizing ... the lens scratch. Ordinary polarized sunglasses generally using a 0.75mm lens, polarized sunglasses, using a thicker 1.13mm Hard films, as compared ... with the 0.75mm, the thicker the film, with easy to deformation, a ...