Check the listing for details. Essilor Crizal Blue Light Blocking Computer Reading Glasses KARRA 578-BLK/GLD. Condition: New. Listed at 139.99 USD. One pair of Essilor polycarbonate lenses with Crizal Prevencia coatingComes with KARRA 578-BLK/GLD frames for Women DescriptionPROTECT YOUR VISIONLong-term and continuous exposure to Harmful Blue Light (or blue-violet light) can contribute to long-term damage of your eyes. Those at highest risk are people with a family history or exhibiting signs of AMD, and working professionals, children, teens, and gamers.Crizal Prevencia lenses reduce exposure to Harmful Blue Light while still allowing beneficial blue-turquoise light to pass through. Plus, they provide all the benefits of no-glare lenses. Help protect your eyes from blue-violet lightwith Crizal Prevencia lenses. CREATED FROM RESEARCH AND COLLABORATIONCrizal Prevencia lenses are the result of several years of research in collaboration with the Vision Institute in Paris, which helped us develop the first clear lenses that selectively filter blue-violet light and contribute to reducing its potential harmful effects on the eye. SHIPPING & GENARAL INFORMATIONWe take PayPal only.Free Priority Mail shipping within the US.Please choose Express Mail if you want faster delivery. It's $28 and guarantees second day delivery.We ship within three business day after payment is cleared. The lenses need to be ordered for your specific Rx.$34.99 for Express Mail/$26.99 for Priority Mail shipping to Canada.$49.99 for Express Mail/$36.99 for Priority Mail shipping to all other countries.We ship USPS Express Mail (EMS) for international shipping. It takes about 5 business days to deliver.We love to combine shipping. There's no additional shipping fee for addtional items as long as they are purchased together.