1.67 Index Diameter: 75mm Decentration 3.0mm Base Curves 1.00, 2.00, 4.50, 5.50, 7.50 Rx Range -13.25 to +6.00 Add Powers +1.00 to +3.00 PolyClear® Diameter: 78mm Decentration 3.0mm Base Curves 2.00, 4.50, 5.50, 7.50 Rx Range -10.00 to +6.00 Add Powers +1.00 to +3.00 InstaShades® 1.50, Gray Only Diameter: 74mm Decentration 3.0mm Base Curves 2.00, 4.50, 5.50, 7.50 Rx Range -8.00 to +6.00 Add Powers +1.00 to +3.00 InstaShades PolyClear, Gray and Brown Diameter: 74mm Decentration 3.0mm Base Curves 2.00, 4.50, 5.50, 7.50 Rx Range -10.25 to +6.00 Add Powers +1.00 to +3.00 Standard Resin and Standard Resin with Scratch Resistance Diameter: 74mm Decentration 3.0mm Base Curves 2.00, 4.50, 5.50, 7.50 Rx Range -10.00 to +5.00 Add Powers +1.00 to +3.00