Ukukhetha iilensi zoqhagamshelwano ezifanelekileyo kufuna ukugxila kwiingongoma ezibalulekileyo ezininzi. I-cornea, umaleko ongaphandle weliso, ithambile kwaye iyanwebeka. Nangona incinci malunga nesiqingatha semilimitha kuphela, ulwakhiwo kunye nomsebenzi wayo ziyinkimbinkimbi kakhulu, zibonelela nge-74% yamandla okuchukumisa iliso. Ekubeni iilensi zoqhagamshelwano zidibana ngqo nomphezulu we-cornea, ukuzinxiba ngokungenakuphepheka kuyayithintela indlela i-cornea efunxa ngayo ioksijini. Ke ngoko, ukukhetha iilensi akufanele kuthathwe lula.

Ngokuphathelele oku, oogqirha bacebisa ukuba banikele ingqalelo engakumbi kwezi mpawu zilandelayo xa bekhethaiilensi zokujonga:

Izixhobo:
Ukuze ufumane intuthuzelo, khetha izinto ze-hydrogel, ezifanelekileyo kubantu abaninzi abazinxiba imihla ngemihla, ingakumbi abo babeka phambili intuthuzelo. Ukuze ufumane intuthuzelo ende, khetha izinto ze-silicone hydrogel, ezibonelela nge-oxygen permeability ephezulu kwaye zilungele abantu abachitha iiyure ezininzi phambi kweekhompyutha.

Igophe elisisiseko:
Ukuba awukaze unxibe iilensi zoqhagamshelwano ngaphambili, ungandwendwela iklinikhi yezonyango lwamehlo okanye ivenkile ye-optical ukuze uvavanywe. Igophe elisezantsi leelensi kufuneka likhethwe ngokusekelwe kwirediyasi egobileyo yomphezulu ongaphambili we-cornea. Ngokwesiqhelo, igophe elisezantsi eliyi-8.5mm ukuya kwi-8.8mm liyacetyiswa. Ukuba iilensi ziyatyibilika ngexesha lokuguguleka, kudla ngokuba ngenxa yegophe elisezantsi elikhulu kakhulu. Ngokwahlukileyo koko, igophe elisezantsi elincinci kakhulu linokubangela ukurhawuzelelwa kwamehlo ngexesha lokuguguleka ixesha elide, liphazamise ukutshintshana kokukrazula, kwaye likhokelele kwiimpawu ezifana ne-hypoxia.

Ukufumaneka kweoksijini:
Oku kubhekisa kubuchule bezinto zelensi bokuvumela ioksijini ukuba idlule, ngokuqhelekileyo kubonakaliswa njengexabiso le-DK/t. Ngokutsho kwe-International Association of Contact Lens Educators, iilensi ezilahlwayo zemihla ngemihla kufuneka zibe nomthamo weoksijini ongaphezulu kwe-24 DK/t, ngelixa iilensi ezigugileyo kufuneka zidlule kwi-87 DK/t. Xa ukhetha iilensi, khetha ezo zinomthamo ophezulu weoksijini. Nangona kunjalo, kubalulekile ukwahlula phakathi komthamo weoksijini kunye nomthamo weoksijini:Ukusasazeka kweoksijini = Ukuvunyelwa kweoksijini / Ubukhulu obuphakathiKuphephe ukukhohliswa lixabiso lokungenela kweoksijini elibhalwe kwiphakheji.

Umxholo wamanzi:
Ngokubanzi, umxholo wamanzi ophakathi kwe-40% ukuya kwi-60% uthathwa njengofanelekileyo. Ukongeza, iteknoloji engcono yokugcina umswakama welensi inokuphucula intuthuzelo ngexesha lokuguguleka. Nangona kunjalo, qaphela ukuba umxholo wamanzi ophezulu awusoloko ungcono. Nangona umxholo wamanzi ophezulu wenza iilensi zithambe, oku kunokukhokelela ekubeni amehlo ome xa eguguleka ixesha elide.

Ngamafutshane, ukukhetha iilensi zokunxibelelana kufuna ukuqwalaselwa ngokupheleleyo kwemeko yamehlo akho, imikhwa yokunxiba, kunye neemfuno zakho. Ngaphambi kokuba uzinxibe, jongana namehlo kwaye ulandele iingcebiso zikagqirha wakho ukuqinisekisa impilo yamehlo.