glass lens, professional quality, low price mineral glass lens, hi-index 1.70, 65mm super thin, transmittance:90.6%; UV320nm mineral glass lens1.hi-index 1.70 aspherical glass lens2.diameter: 65mm, consistency:3.08g/cm33.transmittance:90.6%; UV: 320nm4.professional quality5.SPH: -6.00d ~ -16.00d; CYL: -0.25d ~ -4.00d6.high professional quality