1.56 Cr39 Flat Top Bifocal Lenses FT-28 Uncoated Lens Eyeglasses

Product Name1.56 Flat Top Bifocal UC lensDiameter70mmMonomerNK55 (Imported From Japan)Abbe value42Specific Gravity1.15Power RangeSPH: 0.00~+3.00 0.00~-3.00  ADD: +1.00~+3.50The lower half of a bifocal lens contains the near segment for reading and other close-up tasks. The rest of the lens is usually a distance correction, but sometimes has no correction at all in it, if you have good distance vision.Hard coating: make the uncoated lenses are easily subjicted andexposed to scratchesAR coating/Hard multi coating: protect the lens effectively from reflection, enhance functional and charity of your visionSuper hydrophobic coating: make the lenswaterproof, antistatic, anti slip and oil resistance Other Products: By IndexBy Vision EffectBy MaterialCoating1.49single visionhard resinuncoated1.56bifocalpolycarbonatehard coated1.59progressivephotochromichard multi coated1.61photochromic super hydrophobic hmc1.67polarized  1.74sunglasses   blue block  FAQ:1. Are your company a manufacturer or a trade company?We are a manufacturer with many years exporting experience. Our factory is located in Jiangsu province.2. Can your products be customized?We accept OEM &ODM orders. Actually most of our products are customized. We will try our best to fulfill your requirements about the material, the size, the printing.3. How can I get sample from you?Just send us your requirements, then we will send samples accordingly.4. How many days will samples be finished? How about mass products?Generally, we need 5-7 days to finish the sample production.As for the mass products, it depends on your order quantity.5. How do you control lens quality?Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out .Four times quality checking during production process./* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1