Specifications

1) Flat Top Bifocal Lens
2) Refraction index: Nd=1.499
3) Diameter:55/70mm
4) Abbe Value :58
5) Specific gravity: 1.32

1) Product Name: Round lenses

2) Material:CR-39 PPG

3) Refraction index: Nd=1.499

4) Diameter:55/70mm

5) Abbe Value :58

6) Specific gravity: 1.32

7) HMC+EMI coating and UV protection are available

8) Package:white envelopes  or as customers' requirement

9) Semi-finished or finished are available