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Optical Plastic Lens SEMI-FINISHED LENS

1.56 Photochromic Progressive (14mm) Lens(Brown/Gray)

Material : 1.55 Index Resin (Ne=1.549, Abbe value=43, Specific gravity=1.14)
Add Power : +1.00 to +3.50 in 0.25D steps.
Corridor Length : 14mm

CONVEX SURFACE Concave
Curve
C.T
(mm)
E.T
(mm)
Dia
(mm)
Nominal
Curve
True
Curve
Sag
(sagitta:40mm)
Sag
(sagitta:50mm)
Radius Radius
1.549  
2.50 2.87   1.05 1.64 189.50 95.00 9.5 11.0 70
4.50 4.42   1.62 2.54 122.77 9.5 10.0
6.50 6.57   2.41 3.80  82.69 99.00 9.5  7.5
Center Thickness:0.5mm Edge Thickness:0.5mm Diameter Ranges:0.5mm

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 -11.50 to -4.75 0-6.00
4.50 -4.50 to +2.50 0-6.00
6.50 +2.75 to +6.00 0-6.00