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1.56 Semi tiav Progressive duab grey Optical Lens
Lub lens refractive index siab dua, cov lens nyias dua, qhov ceev dua, qhov nyuaj dua, thiab zoo dua. Ntawm qhov tsis sib xws, qhov refractive index qis dua, lub lens tuab dua, qhov ceev me dua, qhov nyuaj kuj tsis zoo. Feem ntau, iav muaj qhov nyuaj siab, yog li qhov refractive index feem ntau yog li 1.7, thiab cov zaj duab xis resin hardness tsis zoo, qhov refractive index qis dua, cov khoom siv resin hauv khw tam sim no yog qhov refractive index feem ntau yog 1.499 lossis ntau dua, qhov ultra-thin version zoo dua me ntsis, uas muaj qhov refractive index ntawm li 1.56 thiab kuj siv ntau tshaj plaws.
