Izindaba - Ungakhetha kanjani ububanzi boxhumana nabo?

Ungakhetha kanjani ububanzi boxhumana nabo?

Ububanzi

Ububanzi boxhumana nabo buyipharamitha ekukhethweni koxhumana nabo.Kuyinhlanganisela yombala nephethini yoxhumana nabo kanye nosayizi wamehlo akho nabafundi.Ubukhulu be-diameter yoxhumana nabo, umphumela uzobonakala kakhulu, kodwa akunjalo ukuthi ububanzi obukhulu boxhumana nabo, bazobukeka kangcono.

Khetha eyakho

"I-oxygen permeability koxhumana nabo impofu uma iqhathaniswa namalensi okuxhumana avamile, futhi uma ububanzi be-lens yokuxhumana bukhulu kakhulu, kuzothinta ukuhamba kwelensi, okwenza umphumela wokungena komoya-mpilo ube mubi nakakhulu."

Nakuba othintana nabo abanobubanzi obukhulu benomphumela obonakalayo, abafanele wonke umuntu.Abanye abantu banamehlo amancane kanye nomfundi olinganiselayo, ngakho-ke uma bekhetha ukuxhumana okukhudlwana kobubanzi, bazonciphisa ingxenye emhlophe yeso, okwenza iso libukeke ngokuphazima kweso futhi lingathandeki.

Sengisho nje

Ngokuvamile, uma ufuna umphumela wemvelo, ungakhetha u-13.8mm wamehlo amancane, no-14.0mm kubantu abanamehlo amakhudlwana.U-14.2mm uzobukeka obala kancane kumuntu ojwayelekile, ngakho-ke ungakhetha 13.8mm-14.0mm ngomsebenzi wansuku zonke, isikole, nokujola.