... 499,1.56,1.61 Rx Lens RangeIndexProduct DescriptionPower Range Photochromic Lens1.560Single Vision+12.00D~-12.00D,CYL ... -6.00DFlat-top Bifocal+5.00D~-4.00D,CYL-4.00D,1 ... 00D.CYL-4.00D.ADD;150 Bifocal Lens1.499Round-Top +6.00D~-6.00D,CYL-4.00D,1.00 ... 6.00D,CYL-4.00D,1.00—3.00Flat-Top +7.00D~-10.00D,CYL-4.00D,1. ... 00—3.001.560Flat-Top+7.50D~-10.00D,CYL-4.00D,1. ...