home > products > ophthalmic lens >semi-finished LENS
Optical Plastic Lens SEMI-FINISHED LENS

 1.60 Photochromic Flat Top Bifocal Lens (Brown / Gray)

Material : 1.60 Index Resin (Ne=1.599, Abbe value=32, Specific gravity=1.16)
Add Power : +1.00 to +3.50 in 0.25D steps.
Segment Size : 28mm
CONVEX SURFACE CONCAVE
SURFACE
C.T
(mm)
E.T
(mm)
Dia
(mm)
Nominal
Curve
True
Curve
Sag
(sagitta:40mm)
Sag
(sagitta:50mm)
Radius
Radius
2.25 2.11 0.71 1.11 280.00 111.70 8.5 12.2 75
4.25 4.55 1.53 2.40 130.00 132.50 6.4 6.4
6.25 5.92 1.99 3.13 100.00 88.80 8.6 9.5
8.25 8.82 2.98 4.72 67.09 111.70 10.8 6.4 70
Center Thickness:0.5mm Edge Thickness:0.5mm Diameter Ranges:0.5mm