Finished&Semi Finished UC HC HMC EMI avaliable Bifocal Lens Index: 1.499 1.56 1.60 F LAT TOP, ROUND TOP, BLENDED BIFOCALfinished & semi finishedUC ... , RX lens(uncoated, hard coated, HMC, EMI, Super Hydrophobic) including free form, HI-VEX lenses, with index of 1.499, 1.56, 1.60, 1.67 ... us the opportunity to demonstrate our quality service to you. CR39 1.56 1.60 Flat Top Bifocal Lens UC HC HMC EMI