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Optical Plastic Lens SEMI-FINISHED LENS

1.56 Progressive(18mm) Lens

Material : 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 : 18mm

CONVEX SURFACE Concave
Curve
C.T
(mm)
E.T
(mm)
Dia
(mm)
Nominal
Curve
Actual
Curve
Sag
(sagitta : 40 )
Sag
(sagitta : 50 )
Radius
Radius
2.25 2.01 0.73 1.14 273.20 83.00 10.2 14.7 75
4.25 4.72 1.71 2.68 116.23 10.3 12.0
5.50 6.00 2.18 3.42 91.54 10.8 9.6
7.50 8.07 2.94 4.65 68.04 13.6 9.8

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 0.66 0.83 0.99 1.16 1.32 1.49 1.65 1.82 1.98 2.15 2.31

Prescription Range :
Nominal Base Curve Recommended Diopter in Base Cylinder
2.50 -14.50 to -4.25 0-6.00
4.25 -4.00 to +1.75 0-6.00
5.50 +2.00 to +4.50 0-6.00
7.50 +4.75 to +7.50 0-6.00