I- lens yoqhagamshelwano isilungiso esilula, isiqheno okanye isilathiso esivame ukufakwa ngqo kwi-cornea yelihlo. I-lens zoqhagamshelwano zinenzuzo ezininzi kubaphathi, kuquka ukubonakala nokusebenza. Abantu abaninzi bakhetha ukugqoka ii-lensi zokudibanisa ngokuchasene neeklasi zokukhanya njengokuba bengagcini, zibonelela ngommandla wombono obanzi, kwaye zifaneleke kakhulu kwimisebenzi yemidlalo.
I-lens zoqhagamshelwano ziyahluka ngokwezinto zokwakha, ixesha lokugqoka, ishedyuli yokutshintshwa kunye nokuyila. EUnited States, ii-lens zixutywa njengezixhobo zonyango kwaye zidinga imithi yonyango oqeqeshiwe.
UQhagamshelwano loLwazi lokuQala lokuQala
Nangona sicinga ngamacolisi oqhagamshelwano njengalowo uphando lwangoku, ingcamango yaqaliswa nguLeonardo da Vinci. Kwiminyaka engamakhulu amahlanu edlulileyo, wathatha imifanekiso ebonisa indlela amandla okuphikisa iliso angatshintsha ngayo ngokuqhagamshelana ngqo kunye namanzi. Kwiminyaka kamva, abaqambi bacinga ukubeka ingilazi kweso ukutshintsha indlela iso lethu lijolise kuyo. Iingcamango zabo mhlawumbi zaziza kuphuhliswa kakhulu xa bebenokwenza izinto kunye nezindlela zokuvelisa ezikhoyo kubo namhlanje. Phantse kwiminyaka engama-120 edlulileyo izazinzulu zaseJamani zenza i-lens yokuqala ephuma ngaphandle kweglasi. Babizwa ngokuba yi-lens scleral ngenxa yokuba abazange bahlale kwi-cornea, isakhiwo esicacileyo se-dome-engxenyeni yangaphambili yeliso, kodwa kunoko wonke umhlophe omhlophe (sclera) kweso.
IiLenses eziMandla
Ekubeni ngo-1940, i-lens yokuqala yeplastiki yaqulunqwa yayihlala kuphela kwi-cornea. Le plastiki yenziwa nge-PMMA (i-polymethyl methacrylate.) Ngenxa yokuba i-lens yayincinci, ibonakala ikhululekile. Le lensi ayizange ivumele i-oksijini ukuba idlule kwaye ngokunjalo kwi-gridi e-rigine ye-1970 eyayigxininisekile yenzelwe ukulungisa le ngxaki.
Oku kubonakalisa ukuyila kwe-PMMA lens kodwa yayiphilile njengoko yayivumela ukuhamba kweemvula kunye nokuthunyelwa kwe-oxygen.
Iinkcukacha zoLwazi oluLungileyo
Kwaye ngo-1970, abaphuhlisi bazama ukusetyenziswa kwezinto eziphathekayo zePlastiki ezibizwa ngokuba yi-HEMA (i-hydroxyethyl methacrylate.) Lo mbandela wanciphisa amanzi kwaye wawuguquguquka ukuze uguqulwe kwi-cornea. Ngenxa yokuba iplastiki ihambelana nomfanekiso welihlo kwaye yayisithambile kakhulu, iilensi ze-HEMA zanikela ngokukhawuleza ngokukhawuleza. Ezi iilensi zenzelwe ukuba enye ibini idlule malunga nonyaka. Ngenxa yoko, imboni ye-lens yocingo yaqhubela phambili kwizinga eliphezulu lejubane.
Iintengiso zoLwazi lokuLawula
Ngasekupheleni kweminyaka ye-1980 kunye neye-1990, iilensi ezilahlayo ezizithobileyo zafika kwiimarike ezenza ukuba zifikeleleke kwaye zilungele ukuba abantu bagqoke ii-lens. Ezi iilensi zenzelwe ukunxiba ukuya kwiiveki ezimbini, inyanga enye, okanye enye kwikota kuxhomekeke kuhlobo lwe-lens design. Kungekudala emva koko, iilensi ezilahlayo zonke zikhutshwe. Iilensi ezilahla nsuku zonke zigqithwa kuphela ngosuku olunye kwaye zilahlwe.
IiLiclic Lens
Kwiminyaka yakutshanje, ugxininiso luye lwaya kwiplastiki esekelwe kwiplastiki evumela ukuba i-oksijeni engaphezulu iqhume kwi-plastiki kwi-cornea. Kwakhona, abakhiqizi baqhubeka besebenza kanzima ekudaleni iplastiki ebeninzi "emanzini" kwaye ayimile emva kweeyure zokugqoka.
Lens Scleral
Kuyathakazelisa ukuba iilensi zamabhalane ziba ziyaziwayo. Ngenxa yokuba iindlela zokukhiqiza zanamhlanje zixhaswa ngumbono wekhompyutheni, iilensi zamabhalane zinokuklanywa ukwenzela ukuba zikhululekile kakhulu. Iilensi ze-scleral zisetyenziselwa abantu abanesiso esomeleleyo, ubuninzi be-astigmatism, kunye nabantu abanokukhubazeka kwe-corneal kunye ne-degeneration.
Eyaziwayo njenge: Ifowuni