CR-39 progressive optical lens 1) Index of 1.499, 1.56 2) Corridor of 17mm, 14mm, 12mm 3) Uncoated, hard coated, multi-coate CR-39 progressive optical lens Features:1) Index of 1.499, 1.562) Corridor of 71mm, 14mm, 12mm3) Uncoated, hard coated, multi-coated Package: 1) Standard white envelope/box 2) Your design with your own LOGO Certificate:1) CE2) FDA