Nakuba inani lama-contact lens e-hydrogel liphezulu, abelokhu engagculisi maqondana nokuvuleka komoya-mpilo. Kusukela ku-hydrogel kuya ku-silicone hydrogel, kungashiwo ukuthi kufinyelelwe igxathu elifanele. Ngakho-ke, njengeso lokuxhumana elingcono kakhulu okwamanje, yini enhle kangaka nge-silicone hydrogel?
I-silicone hydrogel iyinto ephilayo ye-polymer ethanda amanzi futhi evumela umoya-mpilo ophezulu. Ngokombono wempilo yamehlo, inkinga ebalulekile okudingeka ixazululwe amalensi okuxhumana ukuthuthukisa umoya-mpilo. Amalensi okuxhumana avamile e-hydrogel athembele emanzini aqukethwe ilensi njengesithwali ukuze alethe umoya-mpilo e-cornea, kodwa amandla okuthutha amanzi alinganiselwe kakhulu futhi ahwamuka kalula.Kodwa-ke, ukungezwa kwe-silicon kwenza umehluko omkhulu.Ama-monomer e-siliconezinesakhiwo esixegayo kanye namandla aphansi aphakathi kwama-molecule, futhi ukuncibilika komoya-mpilo okuzo kuphezulu kakhulu, okwenza ukungena komoya-mpilo kwama-silicone hydrogels kuphakame ngokuphindwe kahlanu kunokwamalensi avamile.
Inkinga yokuthi ukumuncwa komoya-mpilo kumele kuncike kokuqukethwe kwamanzi isixazululiwe,kanye nezinye izinzuzo ezilethwe.
Uma okuqukethwe kwamanzi kwamalensi avamile kukhuphuka, njengoba isikhathi sokuguga sikhula, amanzi ayahwamuka futhi agcwaliswe ngokukhala, okuholela ekomeni kwamehlo womabili.
Kodwa-ke, i-silicone hydrogel inokuqukethwe kwamanzi okwanele, futhi amanzi ahlala eqinile ngisho nangemva kokusetshenziswa, ngakho akulula ukukhiqiza ukoma, futhi amalensi athambile futhi akhululekile ngenkathi evumela i-cornea ukuba iphefumule ngokukhululeka.
Ngenxa yalokho
Amalensi okuxhumana enziwe nge-silicone hydrogel ahlala enamanzi futhi ephefumula kalula, athuthukisa induduzo futhi anciphise umonakalo emehlweni, izinzuzo ezingenakuqhathaniswa namalensi okuxhumana avamile.Nakuba i-silicone hydrogel ingasetshenziswa kuphela ukwenza amalensi alahlwayo ajikelezayo amafushane futhi ayikwazi ukusetshenziswa ezintweni ezilahlwayo zonyaka nezesigamu sonyaka, iseyindlela engcono kakhulu kuyo yonke imikhiqizo.
Isikhathi sokuthunyelwe: Agasti-16-2022
