Okwangoku, iilensi zokunxibelelana ezincinci zingasetyenziselwa phantse naluphi na uhlobo lokungaqhelekanga kombono wokukhanyela kwaye, ngokungabikho kokuphikisana, luyindlela elula kakhulu, ekhululekile kwiiglasi. Kwaphulwa okunjalo okunzima njenge-astigmatism, eyayingenakulungiswa ukulungiswa kuphela kwiiglasi kunye neengqungquthela ezinxibelelwano ezinzima, ezibangela ezininzi iingxaki, ngoku zinokulungiswa ngoncedo lwabo. Ukulungisa i-astigmatism, iilensi ezidibeneyo zoqhagamshelwano ziboniswa, kwaye oku kusebenza nakwi-astigmatism ephakamileyo. Makhe siqwalasele ngokubanzi iinkcukacha zezilingo zentsimbi, ziziphi iimpawu zolu lens zokukhetha nokugqoka.
Kuthetha ukuthini "i-lens contact"?
Iilensi ze-toric ziyi-lens zezinto ezizodwa ezizodwa, ezichasene nezilingo eziqhelekileyo, zibonakaliswa ngobungakanani obukhulu kunye nesimo spherocylindrical, i E. baxeshanye babe nemikhosi emibili yokuvula. Oku kuyimfuneko ukuze ulungele i-astigmatism ngoncedo lwexabiso elilodwa kunye ne-meridian efunekayo, kwaye ngoncedo lwenye ixabiso ukulungisa isifo esilandelayo se-refraction-hyperopia okanye ukujonga kwangaphambili .
I-Astigmatism yintsilelo ebonakalayo, apho amandla okukhanya ejongeni ayifani kwiindawo ezahlukeneyo, Kwiliso elinye, iintlobo ezahlukeneyo zokurhoxiswa okanye amadideli ahlukeneyo okufanayo okucatshulwayo zidibeneyo. I-pathology kwiimeko ezininzi zidibaniswa nomhlaba ongaqhelekanga (ongalinganiyo, ongenanto) kwi-cornea okanye i-lens, xa udlula apho imilayezo yokukhanya iphikisana ngezindlela ezahlukeneyo. Kwisigulane, oku kubonakaliswa ukungakwazi ukugxila umfanekiso, obonakala ubonakale, ungabonakali, kunye neempawu ezifana neentloko, iintlungu zeso .
Ukuze i-action yeclindrical component ye-toric lens ihanjiswe kwicandelo elinqwenelekayo le-cornea, loo lensi kufuneka ifake isikhundla esicacisiweyo. Ngoko ke, ngaphezu kweempawu ezichazwe ngasentla, iilensi zokulungisa i-astigmatism zinendlela yokulungisa ngokukhethekileyo ukuzigcina kwindawo ezinzileyo, ezingathinteki ngokukhenkceka kweenkophe, ukunyuka kwamehlo kunye nentloko. Ukulungiswa kungenziwa ngeendlela ezahlukeneyo, phakathi kwazo kukunyuka kwama-lens kwingxenye yabo ephantsi, i-truncation yomgca wezantsi wee-lens,
Ukukhethwa kwee-toric lens
Iilensi ze-Toric azikwazi ukuthengwa nje ngokuqhagamshelana ne-saltic optics. Ngenxa yoko, kuyimfuneko ukubonisana ne-ophthalmologist kwaye uphononongo olubandakanya i-ophthalmometry, refractometry nezinye iindlela. Ukongezelela, iminyaka yobugulane, uhlobo lwemisebenzi yakhe kuthathwa ingqalelo. Ekuqaleni, iilensi zokuvavanya ezikhethiweyo ziyavavanywa, apho isiguli kufuneka sithwale malunga nesiqingatha seyure. Ukuba zonke iiparamitha ezifunekayo zidibeneyo, ngoko ngokwemiqathango ekhethiweyo, iilensi zamanye ziveliswa. Ngaphandle koko, kukhethwa iilensi.
Xa ugqoke iilensi zamathambo, kufuneka ukhumbule ukuba, ekubeni Unobungakanani obukhulu kunokuba ziqhelekileyo, akakho nantoni na inokuhlala ide ixesha lokusetyenziswa, isongela iingxaki ze-hypoxic (ukungabikho kwe-oksijini enikezelwa kwiimboyi zeso). Kubalulekile ukugcina ubukhulu bokutshintshwa, oko
Kwakhona, umntu makangayikhohlwa ukuba iilensi zamathambo kunye nexesha elide lokugqoka zifuna ukunakekelwa kwansuku zonke kunye nezixazululo zemveli ezahlukahlukeneyo.
Abavelisi abahamba phambili beilensi zokuxhamla iifilimi ziinkampani ezinjalo:
- Johnson & Johnson;
- IBausch & Lomb;
- Wohlk-Qhagamshelana-Linsen et al.