Being a member of the China Optometric & Optical Association (COOA), Y&S is one of the leading manufacturers and exporters in China, supplying a full range of Ophthalmic Lenses and Blanks. The company is ISO9001 (2015), ISO14001 (2015), and OHSAS18001 (2007) standard certified, relevant products have been approved by TUV according to CE standards and also registered with the government in many countries. Besides CR-39 Hard Resin Lenses, 1.56 Middle Index Hard Resin Lenses, 1.59 Polycarbonate Lenses, 1.60 / 1.67 Hi-index Hard Resin Lenses, Y&S also provides Mineral White 1.523 Optical (Crown) Lenses, Mineral 1.7 / 1.8 / 1.9 Hi-index Lenses, Photochromic Lenses, and Sunlens. With more than 20 years of experience in this field, Y&S has a high reputation with various products being proved to be very competitive and successful in overseas markets.