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Model Number : GLA1792
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Polarized Test Card : Yes
Model Number : GV18547
Application: Women Men Jewelry Pulseira Masculina Feminina Femme
Anti Radiation Aspheric Prescription CR-39 Resin Lenes Lens Index:1.74 Model Number : GLA1792How to choose lens index Lens index reflects lens thickness, there is 1. 56, 1. 61, 1. 67 index etc. The higher lens index is, the thinner lens is. 1. 67 is thinner than 1. 61 than 1. 56 at the same degree. Lens thickness also depends on frame size. The bigger frame is, the thicker lens is. 1. 56 index suggestion degree: SPH: 0. 00 ~ 4. 00; CYL: 0. 50~ 2. 00 SPH: +0. 50~+4. 00; CYL:+0. 50~+2. 00 1. 61 index suggestion degree: SPH: 0. 00 ~ 6. 00; CYL:
