Kwiminyaka embalwa edlulileyo, iilensi ezinzima zenziwe kuphela kwe-polymethylmethacrylate okanye iglasi. Abazange baphoswe i-oksijeni kwaye babengenakunqweneleka ukugqoka, njengoko bekufuneka baphelelwe rhoqo kwaye baphathwe ngabacoca abazikhethekileyo. Namhlanje, iilensi ezinxibelelwano ezinzima zenziwe ngezinto eziveliswa ngesiseko se-silicone. Banobuchule obuphezulu begesi kwaye banempawu ezininzi ezintle.
Iingenelo zeelensi ezinzima
Iilensi zokudibanisa eziqhelekileyo zokulungiswa kombono zinalo luncedo:
- Ukuzinyameka - kuba izinto ezisenziwa kuzo zizinzi , zibambe ngokusemgangathweni.
- Uzinzo lwezithombe - ezi mveliso aziqhubi xa zikhawuleza, ngoko umfanekiso uhlala ucacile.
- Ukumelana nama-deposit deposits - abaxhatshazwayo kwizinto eziza kummandla wazo ukusuka kwiinkcenkceshe zamanzi, ngoko ke ixesha lokukhusela ngokukhuselekileyo nangokukhululekile kwama-lens landa kakhulu.
- Ubuncinci obuncinane - oku kwenza indawo yangaphandle yendawo ye-cornea ivulekele ngakumbi ukufikelela kwe-oksijini kunye neendwangu eziza kuhlamba iiseli ezifileyo kunye neengqungqutyana zamanye amazwe.
- Ukuzinyameka - ubomi bobuphi ubunzima bobu busuku kunye neelensuku zosuku lugqityiwe kuphela ngenguqu kumbono womsebenzisi.
Ukongezelela, le optics yokulungisa ayiqukethe amanzi. Abawomile emoyeni okanye kushushu, okukuvumela ukuba ungasebenzisi amaconsi okunyusa.
Kulunge nini ukugqoka iilensi ezinzima?
Kwezinye iimeko, iilensi ezinzima,
- ulungiso lwe-orthokeratological;
- njenge-astigmatism (ukuba ukulungiswa okufunekayo ngamalensi athile awanako ukufikelela);
- ubude obude;
- i-keratoconus (isifo se-corneal, apho siphelisiwe okanye siphene).