ShenZhen Crystal-star Tech Co.,Ltd. was established in 2004, specializing in sunglasses lens. Our raw materials are mainly from Germany, Japan, American, and Taiwan. After years research and development, the company now has a weath experience in producing TAC polarized lenses, nylon lenses, PC lenses and 3D stereoscopic lenses. Our optical standard meet EN/ANSI/AS requirements, and have high reputation in this industry. With the development of Crystal-star, We have many pfofessional staffs and high-tech equipment. We committed to provide high quality sun lenses and excellent service for the customers from home and abroad.