1.56 Photochromic Round Shape Bifocal Lens

We are offering photochromic round shape bifocal lens. Description: 1.56 photochromic round-shape bifocal lens,multifocal lenses,bifocal lenses available color: greybrown fast dark, fast clear refraction index nd=1.56 diameter: 7028mm abbe value: 38 product details: available color: greybrown fast dark, fast clear refraction index nd=1.56 diameter: 7028mm abbe value: 38 specific gravity: 1.28 high scratch resistance 35% thinner than cr-39 lens hmc+emi coating and uv protection