In the past decade, Sigo had certified by ISO9001, FDA and CE successively, thus we assures that every piece of our lenses can meet the demands of various customers by the strictest quality inspection. Because we do believe quality control is the foundation to built to last cooperate. On the basis of humanity, the Sigo research and develop team has dedicated themselves to developing various high quality of products. With advanced technology, high end facilities and well equipped production line, all these make us confident to be one of the pilot lens manufacturers among competitors.