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1.56 Semi Finished Progressive yees duab grey Optical Lenses
Lens refractive index yog siab dua, lub thinner lo ntsiab muag, qhov ntau dua qhov ceev, hardness thiab zoo dua, ntawm qhov tsis tooj, qhov qis dua qhov refractive index, lub lens tuab, qhov me dua qhov ntom, hardness kuj tsis zoo, dav dav iav ntawm siab hardness, Yog li qhov refractive index feem ntau yog nyob ntawm 1.7, thiab resin zaj duab xis hardness yog tsis zoo, lub refractive index yog tsawg, resin piece ntawm kev ua lag luam tam sim no yog qhov feem ntau refractive index ntawm 1.499 los yog li ntawd, me ntsis zoo dua yog lub ultra-thin version, uas muaj qhov ntsuas qhov ntsuas ntawm ib puag ncig 1.56 thiab tseem siv ntau tshaj.
