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1) ND: 1.56 2) anti-water,anti-oil dirt,anti-scratch,hi impact-resistance. 3).35% thinner than CR-39 lens slim and thin 4) ABBE value: 38 5) HMC and HMC+EMI coating available in greenish and bluish colors; various fashionable colors available 6) Diameter: 65mm for plus power and 70mm for minus power 7) Range of power: a) Sph: plano ~ -10.00 b) Sph: plano ~ -8.00/C: -0.25 ~ -2.00 c) S: +0.25 ~ +6.00/C: 0-0.25 ~ -2.00 d) RX powers: plano ~ -6.00/-2.25 ~ -4.0, G: +0.25 ~ +4.00/-2.25 ~ -4.008) HC, HMC, EMI, UVA 9) Spherical and aspherical design