Lub lens ua haujlwm yog hais txog cov tsom iav tshwj xeeb uas tuaj yeem coj cov yam ntxwv zoo rau lub qhov muag ntawm cov neeg tshwj xeeb hauv ib puag ncig thiab theem, thiab tuaj yeem hloov qhov kev xav pom thiab ua rau txoj kab pom kev zoo dua, meej thiab muag muag.
Xim hloov lo ntsiab muag: nrhiav kev zam, haum rau myopia, hyperopia, astigmatism, thiab xav hnav looj tsom iav dub tib lub sijhawm. Hanchuang puv xim lo ntsiab muag hloov xim sai sai hauv tsev thiab sab nraum zoov, tiv thaiv UV thiab xiav lub teeb, tsuas yog tsis txias heev!