● Basic standard stock lens series npog yuav luag tag nrho cov lo ntsiab muag uas muaj ntau yam kev pom nyob rau hauv lub refractive index: ib lub zeem muag, bifocal thiab progressive lo ntsiab muag, thiab tseem npog cov qeb ntawm tiav thiab semi-tiav khoom, uas yuav ua tau raws li cov kev xav tau ntawm cov neeg feem coob nrog qhov muag plooj. pom kev. Kho qhov muag deviations.
● Muaj ntau yam khoom siv, suav nrog cov khoom siv cob, polycarbonate, thiab cov khoom siv high-index, uas muaj qhov sib txawv ntawm cov thickness, qhov hnyav, thiab kav ntev. Tag nrho cov lo ntsiab muag kuj muaj nyob rau hauv cov txheej txheem sib txawv, xws li cov tshuaj tiv thaiv kev cuam tshuam los txo qhov pom kev pom thiab txhim kho qhov pom kev pom tseeb, lossis UV txheej los tiv thaiv lub qhov muag los ntawm cov teeb meem ultraviolet rays. Lawv tuaj yeem ua rau ntau yam ntawm cov thav ntawv thiab tuaj yeem siv los ua cov tsom iav nyeem ntawv, tsom iav tsom iav, lossis kho qhov muag pom kev deb.