Specifications

1) Optical bifocal lenses
2) Refraction Index Nd= 1.499
3) Abbe Value: 58
4) Specific Gravity: 1.32
5) Diameter: 70/28mm

1) Product Name:Optical  bifocal  lenses

2) Refraction Index Nd= 1.499

3) Abbe Value:  58

4) Specific Gravity: 1.32

5) Diameter:70/28mm

6) Coating: HC,HMC+EMI

7) HMC+EMI coating   

8) Package: white envelopes  or as customers' requirement

9) Semi-finished or finished are available