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1.60 S/F Flat Top Bifocal Lens

1.60 S/F FLAT TOP BIFOCAL LENS
Material refractive index=1.590               Tooling index=1.530
Diameter Nominal  T.C. Rad Back  E.T. C.T. Sag Seg  Seg Add Rx Range     Recommended
Curve Curve Inset Drop Range
70/28mmSFX 50 0.53 1008.22 2.00 20.00 17.70 0.31 5 5 0.75-4.00 -5.25D/-14.00D
70/28mm 50 0.53 1008.22 5.60 13.50 8.00 0.31 5 5 0.75-4.00 -5.25D/-10.00D
70/28mm 200 2.03 261.02 5.60 11.00 6.00 1.20 5 5 0.75-4.00 -2.00D/-5.00D
70/28mm 400 3.92 135.29 5.60 9.00 7.50 2.33 5 5 0.75-4.00 -1.00D/-3.00D
70/28mm 600 6.09 86.98 5.60 9.00 8.80 3.67 5 5 0.75-4.00 +2.00D/-2.00D
70/28mm 800 8.09 65.48 5.60 7.00 9.50 4.96 5 5 0.75-4.00 +2.00D/+5.00D
                         
1.60 S/F FLAT TOP BIFOCAL LENS
Material refractive index=1.590               Tooling index=1.530
Diameter Nominal  T.C. Rad Back  E.T. C.T. Sag Seg  Seg Add Rx Range     Recommended
Curve Curve Inset Drop Range
75/35mm 50 0.53 1008.22 5.60 13.50 6.80 0.31 5 5 1.00-4.00 -5.25D/-10.00D
75/35mm 200 2.03 261.02 5.60 11.00 6.20 1.20 5 5 1.00-4.00 -2.00D/-5.00D
75/35mm 400 3.92 135.29 5.60 9.00 7.00 2.33 5 5 1.00-4.00 -1.00D/-3.00D
75/35mm 600 6.04 87.75 5.60 9.00 9.70 3.64 5 5 1.00-4.00 +2.00D/-2.00D
75/35mm 800 8.04 65.92 5.60 7.00 11.00 4.93 5 5 1.00-4.00 +2.00D/+5.00D
Note: T.C.: True Curve;   Rad: Radius(mm);  E.T.: Edge Thickness(mm);  C.T.: Center Thickness(mm);  Sag: Sag at 50(mm)