1).1.74 High Index Super thin lenses, 2).MR-174 material. 3).HMC+EMI with aspherical design. 4).Size:75mm Power range: SPH: -3.00~-15.00 SPH:-3.00~-15.00 ,Cylinder:-2.00 SPH:-3.00~-10.00,Cylinder:-4.00 Rx available for cusomised.