Nakuba inani lamalensi othintana ne-hydrogel liphakeme, lihlale lingagculisi mayelana nokungena kwe-oxygen. Kusukela ku-hydrogel kuya ku-silicone hydrogel, kungashiwo ukuthi ukugxuma kwekhwalithi kufinyelelwe. Ngakho-ke, njengeso lokuxhumana elingcono kakhulu okwamanje, yini enhle kangaka nge-silicone hydrogel?
I-Silicone hydrogel iyi-hydrophilic organic polymer material ene-oxygen ephezulu yokungena. Ngokombono wezempilo yamehlo, udaba olubalulekile okumele amalensi okuxhumana abhekane nalo wukuthuthukisa ukungena komoyampilo. Amalensi okuxhumana avamile e-hydrogel ancike emanzini aqukethwe ilensi njengesithwali sokuletha umoya-mpilo ku-cornea, kodwa amandla okuthutha amanzi alinganiselwe kakhulu futhi ahwamuka kalula uma kuqhathaniswa.Nokho, ukwengezwa kwe-silicon kwenza umehluko omkhulu.Ama-Silicone monomersabe nesakhiwo esixekethile namandla aphansi e-intermolecular, futhi ukuncibilika kwe-oksijini kuwo kuphezulu kakhulu, okwenza ukufinyeleleka kwe-oksijini yama-silicone hydrogels aphindwe kahlanu kunalawo amalensi ajwayelekile.
Inkinga yokuthi ukungena kwe-oxygen kumele kuncike emanzini isixazululiwe,nezinye izinzuzo ziye zalethwa.
Uma okuqukethwe kwamanzi kwama-lens ajwayelekile kwanda, njengoba isikhathi sokugqoka sikhuphuka, amanzi ayahwamuka futhi agcwaliswe ngezinyembezi, okuholela ekomeni kwawo womabili amehlo.
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
ama-contact lens enziwe nge-silicone hydrogel ahlala enamanzi futhi ephefumula, athuthukisa induduzo futhi anciphise ukulimala kwamehlo, izinzuzo ezingenakuqhathaniswa namalensi okuxhumana avamile.Nakuba i-silicone hydrogel ingasetshenziswa kuphela ukwenza amalensi alahlwa umjikelezo omfushane futhi ayikwazi ukusetshenziswa ezintweni ezilahlwayo zaminyaka yonke kanye nengxenye yonyaka, iseyisinqumo esingcono kakhulu sayo yonke imikhiqizo.
Isikhathi sokuthunyelwe: Agasti-16-2022
