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Optical Plastic Lens SEMI-FINISHED LENS

1.56 Progressive (12mm)

Meterial : 1.56 Index Resin (Ne=1.549, Abbe=38, Density=1.28)
Add Power : +1.00 to +3.50 in 0.25D steps.
Corridor Length : 12mm

CONVEX SURFACE Concave
Curve
C.T
(mm)
E.T
(mm)
Dia
(mm)
Nominal
Curve
Actual
Curve
Sag
(sagitta:40mm)
Sag
(sagitta:50mm)
Radius Radius
1.50 1.45 0.53 0.82 378.571 83.00 8.9 14.8 75
3.50 3.52 1.28 2.00 155.882 9.6 13.0
5.75 5.90 2.14 3.37 92.982 9.8  9.7
7.75 8.03 2.92 4.62 68.387 13.5  9.9

Add Prism(Down):
ADD 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50
Prism 0.35 0.44 0.53 0.61 0.70 0.79 0.88 0.96 1.05 1.14 1.23

Prescription Range:
Nominal Base Curve Recommended Diopter in Base Cylinder
1.50 -14.00 to -4.75 0-6.00
3.50 -4.50 to +1.00 0-6.00
5.75 +1.25 to +4.50 0-6.00
7.75 +4.75 to +7.50 0-6.00