Following are the specifications of CR-39 Lenses:
1) Nd = 1.499
2) Power range:
a) Sph: -6.25~ -20.00, +6.25~ +10.00
b) Cyl: -2.25~ -4.00, -4.25~ -6.00
3) Diameter: 50 / 55 / 60 / 65 / 70mm
4) Coating: Uncoated / HC / Tintable HC / HMC / HMC + EMI
Cr-39 Round Top Bifocal Lenses
Finished lenses:
a) Nd: 1.499
b) Power range:
Sph: 0... |