... Spherical&Aspherical 1.56 optical lens 1. first-class optical lab 2. optimized thickness 3. CE&FDA 1.56 optical lensindex ... ,1.56,1.59,1.60,1.67,1.74single vision,progressive,polarized,transition(photochromic) availableHC, HMC, UC, UV, Hydrophobic coating ... U.S. Colts optics laboratory in 2009. 1.56 single vision lens