Lunettes de vue optiques progressives multifocales pour femmes, verres polarisés à clip magnétique, marque tendance

Notice: 1. We will start to produce very soon after the payment. Prescription glasses orders cannot be cancelled or revised after 3 hours of payment; 2. Production  time 4-7 days for prescription glasses, please wait patiently; 3. Custom prescription sunglasses, we sest you provide ±0.25 degrees less when filling the data if you are more than ±3.00 degrees, otherwise you will feel dizzy with this large sunglasses frame; 4. For special cylinder above ±2.00 degrees, we charge extral cost;Cylinder ±2.00 or ±6.00 ( ADD $15 ) For custom prescription glasses, we need to know the following datas. OD-Right Degree : OS-Left Degree : PD-Pupillary Distance : If you have Cylinder, we need to know the following datas. OD-Right Cylinder (CYL) : OS-Left Cylinder (CYL) : OD-Right Axis: OS-Left Axis: Any question, feel free to contact the online service. Thickness of the lenses depends on a few factors. 1. Prescription strength. The stronger the prescription, the thicker the lens, all else being equal. 2. Frame selection/fit. All else being equal, the larger the size of the lens, the thicker it gets (thickness proportional to size). 3. The higher the index of refraction, the less of a material is necessary to bend, or focus, the light in the same way for the same prescription. So, higher index material lenses will also reduce thickness and Coke bottle effect. Helps for common discomforts. 1. New glasses 2. New Prescription 3. The change of frame shape may cause discomfort. 4. Discomfort caused by discordance of prescription and lens index. 5. Discomfort caused by the spherical lens.