1.Ngokwendawo emiselweyo ye-lens ye-intraocular kwiso, inokwahlulwa ibe yi-lens yangaphambili ye-intraocular lens kunye ne-posterior chamber intraocular lens.I-anterior chamber intraocular lens (IOL) idla ngokufakelwa kwigumbi elingasemva ngenxa yeengxaki ezininzi zasemva kokuhlinzwa.
2.Ukuhlelwa ngokwezinto zelensi ye-intraocular
A. I-Polymethylmethacrylate (PMMA): i-polymethylmethacrylate yinto yokuqala esetyenziselwa ukuvelisa i-intraocular lens.Yeyona nto ikhethwayo kwilensi ye-intraocular eqinile.Inomsebenzi ozinzileyo, ubunzima obulula, ukubonakala kakuhle, kwaye ayiyi kuthotywa yi-biological oxidation reaction of the body.Isalathisi se-refractive yi-1.49.Ukungalungi kukuba ayinakumelana nokushisa okuphezulu kunye noxinzelelo oluphezulu lwe-disinfection.Okwangoku, igesi ye-ethylene oxide isetyenziselwa ukubulala iintsholongwane, kwaye ukuguquguquka kwayo akubikho.Kukho iintlobo ezimbini zokusetyenziswa kweklinikhi: enye yi-lens ye-intraocular ephoswe kwaye icinezelwe ngezinto ze-PMMA ngexesha elinye, elibizwa ngokuba yiqhekeza elinye;Okwesibini, inxalenye ye-lens optical yenziwe nge-PMMA, kwaye i-loop yokuxhasa yenziwe nge-polypropylene, ebizwa ngokuba ngamaqhekeza amathathu.
B. Ijeli ye-Silicon: yinto ephambili ye-lens ethambileyo ye-intraocular, ngokuzinza kakuhle kwe-thermal, i-disinfection ephezulu yokubilisa, i-stable structure ye-molecular, ukumelana nokuguga okulungileyo, i-biocompatibility efanelekileyo, ukuthambisa kunye nokuqina.Inokufakwa ngokusikwa kancinci.Isalathiso se-refractive sisuka kwi-1.41 ukuya kwi-1.46.Izinto ezingeloncedo kukungaqini kakuhle, ukuguquguquka phantsi kwamandla oomatshini, kulula ukuvelisa isiphumo se-electrostatic kwaye kulula ukufunxa imiba yangaphandle.
C. I-Hydrogel: i-poly (i-hydroxyethyl methacrylate) i-hydrophilic material, enomxholo wamanzi we-38% - 55%, ukuya kwi-60%, ukuzinza okulungileyo, ukuhambelana kakuhle kwe-biocompatibility, ukumelana nokushisa okuphezulu kunye nobunzima obukhulu.Ilensi ye-intraocular inokuphelelwa ngamanzi kwaye ifakwe.Emva kokubuyiselwa emanzini, ukuthamba kwayo kubuyiselwe kwaye ubude bayo bomgca bonyuswe nge-15%.Ngenxa yokuba isisityebi ekungeneni kwamanzi, i-metabolites ye-intraocular ingangena ngaphakathi kwaye ibambelele kungcoliseko, echaphazela ukucaca.
D. I-Acrylate: yi-copolymer eyenziwe nge-phenylethyl acrylate kunye ne-phenylethyl methacrylic acid.Ineempawu ezifanayo zamehlo kunye nebhayoloji njenge-PMMA, kodwa ikwanokuthamba.Isalathiso se-refractive yi-1.51, i-lens ye-intraocular incinci, kwaye i-lens ye-intraocular edibeneyo inokwandisa ithambile kwaye icotha.
Ixesha lokuposa: Aug-26-2022
