Danyang bosen optical co., ltd. is located in danyang city of jiangsu province, china. we are exporting optical lens to many countries of western europe, north america, mid-east asia and south-east asia. we have obtained the ce and fda certificates. so our products enjoy high reputation among customers because of our good quality and reasonable price. we can supply you the lens as following: 1. glass lens (index 1.523, 1.70, uncoated & a/r, size 65/70 mm) 2. cr-39 lens (index