PC lens, tseem hu ua "qhov chaw zaj duab xis", vim tias nws muaj kev cuam tshuam zoo heev, nws kuj muaj lub npe hu ua mos txwv iav.Polycarbonate lo ntsiab muag yog cov resistant rau kev cuam tshuam, yuav tsis tawg.Lawv muaj 10 npaug zog dua li iav los yog cov yas yas, ua rau lawv zoo tagnrho rau cov menyuam yaus, kev nyab xeeb lo ntsiab muag, thiab kev ua si sab nraum zoov.
Cov lo ntsiab muag muaj txiaj ntsig, qee zaum hu ua "tsis muaj kab bifocals," tshem tawm cov kab pom ntawm cov tsoos bifocals thiab trifocals thiab zais qhov tseeb tias koj xav tau tsom iav nyeem.
Tags:bifocal lens, progressive lens, 1.56 pc lens