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1.56 Bifocal Flat top / Round Top / Blended HMC optical lenses
Cov tsom iav bifocals yog cov tsom iav uas muaj ob qho chaw kho thiab feem ntau yog siv rau kev kho qhov muag presbyopia. Thaj chaw uas cov tsom iav bifocals kho qhov pom kev deb hu ua thaj chaw pom kev deb, thiab thaj chaw uas kho qhov pom kev ze hu ua thaj chaw pom kev ze thiab thaj chaw nyeem ntawv. Feem ntau, thaj chaw deb loj dua, yog li nws kuj hu ua daim tseem ceeb, thiab thaj chaw ze me dua, hu ua daim seem.
