... .single vision ,sunglass lens CR39 progressive lens We have all kinds of lens, All kinds of index lens.such as :1.499,1.56,1.60,1.591,1.67,1.74,There are single ... kinds of semi finished lens The following is progressive lens data, our progressive stock lens , we have 1.499 ,1.56,1.61 index. The following is 1.499 progressive.