Semi-Finished – SOMO 1.67 Aspheric-SV Base Curves: 0.50 2.25 4.25, 6.25 8.25 SOMO Aspheric 1.67 Hardcoat High IndexScratch Resistant Coat Specifications Aspheric DesignMR-7 Material1.67 Refractive Index1.35 Specific Gravity32 Abbe Value100% UV Protection at 400nmScratch-Resistant Hardcoat