1.Ngokwesimo esinqunyiwe se-lens ye-intraocular esweni, ingahlukaniswa ibe yi-lens yangaphakathi ye-intraocular lens kanye ne-posterior chamber intraocular lens.I-anterior chamber intraocular lens (IOL) ivamise ukufakwa egunjini elingemuva ngenxa yezinkinga eziningi zangemva kokuhlinzwa.
2.Ukuhlukaniswa ngokwezinto zelensi ye-intraocular
A. I-Polymethylmethacrylate (PMMA): i-polymethylmethacrylate yinto yokuqala esetshenziselwa ukukhiqiza ilensi ye-intraocular.Yizinto ezikhethwayo zamalensi e-intraocular eqinile.Inokusebenza okuzinzile, isisindo esilula, ukukhanya okuhle, futhi ngeke kwehliswe ukusabela kwe-biological oxidation yomzimba.Inkomba ye-refractive ingu-1.49.Okubi wukuthi ayimelani nezinga lokushisa eliphezulu kanye nokukhishwa kwamagciwane ngomfutho ophakeme.Njengamanje, igesi ye-ethylene oxide isetshenziselwa kakhulu ukubulala amagciwane, futhi ukuguquguquka kwayo akulungile.Kunezinhlobo ezimbili zokusetshenziswa komtholampilo: eyodwa ilensi ye-intraocular ephonswe futhi icindezelwe ngezinto ze-PMMA ngesikhathi esisodwa, okubizwa ngokuthi ucezu olulodwa;Okwesibili, ingxenye ye-lens optical yenziwe nge-PMMA, futhi iluphu yokusekela yenziwe nge-polypropylene, ebizwa ngokuthi izingcezu ezintathu.
B. Ijeli ye-Silicon: iyisisetshenziswa esiyinhloko se-lens ethambile ye-intraocular, enokuqina okuhle kokushisa, ukukhishwa kwe-disinfection ephezulu yokucindezela, ukwakheka kwamangqamuzana okuzinzile, ukumelana nokuguga okuhle, i-biocompatibility enhle, ukuthambile nokunwebeka.Ingatshalwa ngokusika okuncane.Inkomba ye-refractive isukela ku-1.41 kuye ku-1.46.Ububi ubulukhuni obumpofu, ukuhlukahluka ngaphansi kwamandla kagesi, ukukhiqiza umphumela we-electrostatic kalula futhi kulula ukumunca izindaba zakwamanye amazwe.
C. I-Hydrogel: i-poly (i-hydroxyethyl methacrylate) i-hydrophilic material, enamanzi angama-38% - 55%, kufika ku-60%, ukuzinza okuhle, i-biocompatibility enhle, ukumelana nokushisa okuphezulu kanye nokuqina okukhulu.I-lens ye-intraocular ingaphelelwa amanzi futhi ifakwe.Ngemva kokubuyiselwa emanzini, ukuthamba kwayo kuyabuyiselwa futhi ubude bayo bomugqa bukhuphuke ngo-15%.Ngenxa yokuthi inothile ekungeneni kwamanzi, ama-metabolites e-intraocular angangena ngaphakathi futhi anamathele ekungcoleni, okuthinta ukubonakala.
D. I-Acrylate: iyi-copolymer eyakhiwe nge-phenylethyl acrylate ne-phenylethyl methacrylic acid.Inezici ezifanayo zokubona nezebhayoloji njenge-PMMA, kodwa futhi inokuthamba.Inkomba ye-refractive ingu-1.51, ilensi ye-intraocular incane, futhi ilensi ye-intraocular egoqiwe inganwebeka ngokuthambile futhi kancane.
Isikhathi sokuthumela: Aug-26-2022
