ʻO ka lens PC, ʻike ʻia hoʻi ʻo "space film", ma muli o kona kūpaʻa maikaʻi ʻana i ka hopena, ua ʻike ʻia hoʻi ʻo ia he aniani hōʻoia pōkā.Paʻa loa nā lens polycarbonate i ka hopena, ʻaʻole e haki.He 10 mau manawa ʻoi aku ka ikaika ma mua o ke aniani a i ʻole ka plastik maʻamau, e kūpono ana iā lākou no nā keiki, nā lens palekana, a me ka hana waho.
ʻO nā lens holomua, i kapa ʻia i kekahi manawa "no-line bifocals," e hoʻopau i nā laina ʻike ʻia o nā bifocals kahiko a me nā trifocals a hūnā i ka ʻoiaʻiʻo he pono ʻoe i nā aniani heluhelu.
Nā huaʻōlelo:lens bifocal,lens holomua,1.56 pc lens