... avaliable Bifocal Lens Index: 1.499 1.56 1.60 F LAT TOP, ROUND TOP, BLENDED BIFOCALfinished & semi finishedUC,HC,HMC,EMIAs the ... -VEX lenses, with index of 1.499, 1.56, 1.60, 1.67, both in finished and semi-finished. At the ... demonstrate our quality service to you. CR39 1.56 1.60 Flat Top Bifocal Lens UC HC HMC EMI