Polycarbonate Finished Flat Top Bifocal 

Finished

Bifocal Lenses contain two different prescriptions in the same lens, providing an   optimal balance between near and far vision. Without blind area issue. 

Power Range

Minus Power:70mm

Plus Power:70mm

ADD : 1.00D to 3.00D in 0.25D steps

SPH: +3.00 ~ -3.00

ADD(Additions): +1.00 ~ +3.00

SPH

ADD (+)

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

+3.00

+2.75

+2.50

+2.25

70 mm

+2.00

+1.75

+1.50

+1.25

+1.00

+0.75

+0.50

+0.25

-0.00

-0.25

-0.50

-0.75

-1.00

70 mm

-1.25

-1.50

-1.75

-2.00

-2.25

-2.50

-2.75

-3.00

Semi- Finished

 Bifocal Lenses contain two different prescriptions in the same lens ,

providing an optimal balance between near and far distance.

Without blind area issue. Bifocal Semi-Finished Lenses are designed for labs.

The product contains various bases plus high quality requirement by Sundex,

which make it the only choice for professional Labs like you.

SPH

ADD

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

2.00D

70mm

4.00D

6.00D

Diamete
mm

Base Curve

Depth
@50mm

Depth
@40mm

Center Thickness

Edge Thickness

RX True Curve@1.530(D)

Back Curve

ADD

Design and Suggested RX Range

70mm

2.00 D

1.20±0.01

0.767±0.01

9.5±0.15

12.0±0.3

2.046±0.05

4.00

+1.00 to +3.00

-2.25
  to
-7.00

4.00 D

2.38±0.01

1.510±0.01

8.9±0.15

9.5±0.3

4.067±0.05

5.12

+1.00 to +3.00

+175 
to
-2.00

6.00 D

3.53±0.01

2.250±0.01

7.9±0.15

8.5±0.3

6.033±0.05

6.25

+1.00 to +3.00

+5.00 
to
+2.00

Becareful during fitting and grinding：
Photochromic lenses are softer than normal lenses, too much clampping pressure during fitting or grinding could result in dent or depressed surface. 
Soft padding is recommended to reduce clampping pressure.