Polarized Lens Prescription Sunglasses Lens UV400 Optical Prescription CR-39 Resin Colorful Mirror Lens 1 Pair Color:Polarized Grey 65inch Package : With frame

65inch Package : With frame case

Model Number: HT-3-18kDA

Model Number: LE0432A

Model Number : gxyj-749

Polarized Lens Prescription Sunglasses Lens UV400 Optical Prescription CR-39 Resin Colorful Mirror Lens 1 Pair Color:Polarized Grey 65inch Package : With frameHow 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: