1.56 Progressive Lens (14mm short corridor) HMC EMI Detailed Product DescriptionSpecification :1). Refractive Index:1.562). Short corridor: 14mm Regular corridor: 17mm (Also available)3). Finished Lens power : SPH(+0.00~+3.00) ADD(+1.00~+3.00) SPH(+0.00~-10.00) ADD(+1.00~+3.00) 4). Semi-finish lens Base : 1.00,3.00,5.00 ADD:(+1.00~+3.00) 5). Coating : UC,HC, HMC, EMI ,Hydrophobic