Xov xwm
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Yuav ua li cas paub qhov txawv iav lo ntsiab muag los ntawm resin lens?
1. Cov khoom sib txawv Cov khoom siv tseem ceeb ntawm cov iav lo ntsiab muag yog iav kho qhov muag; Resin lens yog cov khoom siv organic nrog cov qauv saw hlau hauv, uas yog txuas ...Nyeem ntxiv -
Bifocal iav
Thaum tus neeg lub qhov muag hloov kho tsis muaj zog vim muaj hnub nyoog, nws yuav tsum kho nws lub zeem muag cais rau qhov pom deb thiab ze. Lub sijhawm no, nws feem ntau xav tau ...Nyeem ntxiv