single vision lens 1.1.67/1.74 single vision clear ,HC, HMC, EP coating. single vision ... lens.such as :1.499,1.56,1.60,1.591,1.67,1.74,There are single visin, progressive lens,flat top lens,round top, photochromic lens,Polarize ... lens.And all kinds of semi finished lensThe following is 1.67/1.74 single vision details.