Ower plant has the opportunity to propose you the spectacle's lenses of high quality. Stigmatic lenses: glass BKS (U) , the coefficient of refraction is 1, 525 with UV-protectionCoisting from 0, 8 to 1, 2 USD each. Basic Nomenclature (possible changes for your) Diameter (mm) Refraction (DPTR) 64 from 0, 0 to + 4, 0 (step 0, 25) 64 from + 4, 5 to + 8, 0 (step 0, 5) 64 from-6, 5 to-11, 0 (step 0, 5) 68 from 0, 0 to + 4, 0 (step 0, 25) 68 from 0, 0 to-4, 0 (step 0, 25) 68 from 4, 5 to + 6, 0 (step 0, 5) 68 from-4, 5 to-6, 0 (step 0, 5) 60 from 0, 5 to + 4, 0 (step 0, 25) 60 from + 8, 0 to + 10, 0 (step 0, 5) 60 from + 11, 0 to + 13, 0 (step 1, 0) We also produce and sale raw mineral lenses (for this nomenclature) . All our production scertified in Ukraine (Ukrainian SEPRO System) and in Russia (RSt) .