Ekhuselekileyo kunamaqhagamshelwano ahlala rhoqo?
Izigidi zabantu zihlala zincinci i-lens yokubambisa i-lens nsuku zonke. Nangona kunjalo, ii-lens zoqhagamshelwano azingozini . Ubunzima, ukukhathazeka kwamehlo okubangela ukulahleka kombono okanye ukungaboni kakuhle. Nangona ukuvama kwezi zifo kuleso ncinane, ukubonakala kusekho okwaneleyo ukuba oogqirha balumkise izigulane zengozi ezibandakanya ukugqoka i-lens, kunye nokucebisa iimveliso ezithile ezinokuba luncedo kwizigulane zabo.
Njengomphumo weengozi ezinxulumene neengubo zengxube yoqhagamshelwano, uphando lwentsimbi kunye nophuhliso lugxininise kwixesha elidlulileyo ekuveliseni iilensi ezivumela amanqanaba aphezulu oksijini ukuba adlule kuwo. Abaphandi bacinga ukuba xa kunokwenziwa izinto eziza kwenza ukuba i-oksijeni engapheliyo ifike kwi- cornea xa kuthelekiswa nokungagqoki naliphi na i-lens, ezi zifo ezibuhlungu kunye nezinye izilwanyana ezinxulumene nazo ziza kuncitshiswa okanye zipheliswe kanye kunye.
Oxygen Deprivation Syndrome
Phantse ngo-1995, ii-lens eziphezulu zokuxhunywa kwe-oxygen ezenziwe nge-silicone zaphinde zaziswa kuluntu. Ezi iilensi ezintsha zivunyelwe ngokuphindwe kasikhombisa umlinganiselo we-oksijeni njengama-lens okwangoku ukuba udlulele kwi-cornea neliso, kwanaxa ubuthongo.
Ngoko, siphi na ngoku? Ngaba ezi iilensi ze-silicone eziphezulu zanceda ukuphelisa iingxaki? Impendulo ibe yee no-no. Iilensi ze-silicone zinika indawo ephilileyo kwiso.
Izigulane ezininzi ezigqoke ngokugqithiseleyo ii-lens ezinokuthintana nazo rhoqo zingahlakulela "i-oxygen deprivation syndrome." I-oxygen deprivation syndrome yinto ehlanganiswe yoshishino lokunyamekela kwamehlo ukumela izigulane ezingenayo intsholongwane, kodwa zikhukhumeza kwi-corneas yazo kwaye zenze i-neovascularrization, okanye "ukukhula kweemveliso zamanzi" kwamehlo abo.
Le mijelo yegazi engaqhelekanga izama ukondla i-oksijeni kwi-cornea ngokusebenzisa ukuhamba kwegazi esikhundleni se-atmosphere apho i-cornea ivame ukufumana i-oksijini yayo. Ezi zi gulane zihlala zi namehlo obomvu kwaye umbono wazo uguquka kakhulu ngenxa yokuvuvukala. Ngenxa yoko, kunzima kwigqirha lamehlo ukuvavanya umbono wabo ngexesha lokuhlola iso . Nangona kunjalo, xa oogqirha bawafakela kwi-lens entsha ye-silicone-based, ngokuphantse, ezininzi zezo zibonakalisi okanye iimpawu zixazulula ngokukhawuleza.
Uphando alubonisi ubungozi obuncitshiswa bokusulela
Kuthiwani ngosuleleko? Ngaba ezi iilensi ziphelisa nokusuleleka izifo? Uphando olutshanje lugqitywe ngabaphandi bo-Australia kunye noBukumkani baseUnited Kingdom ukuba bafumane ukuba i-lens entsha ye-silicone ye-hydrogel iyakunciphisa ingozi yokusuleleka kwintlawulo ngenxa yokuphuculwa kwe-oxygen. Ezi zifundo zivumile ukuba iilensi ze-silicone azizange zinciphise umngcipheko we- bacterial keratitis kubaphathi be-lens. Uphando lwangoku lujolise kwiiyiphi oogqirha bezonyango abaye baziva ngayo ngeminyaka: Izifo ezinxulumene ne-lens zibangelwa ziziganeko ngaphandle kwe-oksijeni, njenge-stagnation yeqabunga, ukuguqulwa kummandla we-cornea, kunye nokunyuka kwee-cell corneal ezibangelwa iingubo zentsimbi.
Kubalulekile ukuqonda ukuba ukuhanjiswa kwe-oksijeni kuseyona nto inkulu, kodwa akusiyo yodwa into ebangela ukuba suleleke.
Umngcipheko omnye ubonakala ngathi uphendulele yonke into eqhutywe kwi-keratitis ene-lens .... Enye into ebalulekileyo yengozi yokulahleka kombono ogqithisiweyo igqoke iilensi ngobusuku bonke. Umngcipheko wakho wokuphuhlisa isifo iphindwe kathathu xa ulala kwiilensi zokuxhumana. Eminye imingcipheko yokuphuhlisa ukukhuselwa kwezilingo ezinzulu zibandakanya ukutshaya, ukuthenga iilensi nge-intanethi , isimo sezantsi sentlalo-qoqosho, ukucocwa okungafanelekanga , ixesha elide lokugqoka, kunye nolutsha .
Ucwaningo lwase-UK lufumene ukuba ubungozi buhluka ngokubaluleka ngokuxhomekeka kwimiqondiso yelensi yokuqhagamshelana. Kulo cwaningo, abaphandi bajonga ukuba ingasetyenziswa njani, iilensi zokunxibelelana ezilahla nsuku zonke zinomlinganiselo ophantsi wokusuleleka kweeveki ezimbini okanye iilensi ezilahla ngenyanga. Ngokuthakazelisayo, abathwali be-lens abalahla imihla ngemihla babenomngcipheko ophezulu wama-1.5 wokuphuhlisa i-keratitis. Nangona kunjalo, uhlobo lwebhaktheriya okanye "bug" lwaluhle kakhulu. Ngamanye amazwi, izinto ezibangelwa izifo kwi-lens ye-lens ezilahla nsuku zonke azizange zenze ukuba ilahleko lombono lulahleke. Enyanisweni, akukho nabathwali abalahla imihla ngemihla abaphelile iziphumo zombono ongaphezu kwe-20/40.
Iimveliso zamanje ze-silicone i-hydrogel iilensi ezikhoyo, ukwenzela ukuba i-oksijeni yokudluliselwa kweyona okwizinga eliphezulu kakhulu:
- U-Night Optix Night & Day ngo-Alcon
- I-Air Optix Aqua yi-Alcon (ikhuthaza intuthuzelo kubantu abagqoka ii-lens imihla ngemihla)
- I-Biofinity EW ngoCopervision
- I-Acuvue Oasys ngeVistakon (eyenzelwe ukuba ibe nemanzi eninzi kunamanye, inenzuzo kubantu abanamehlo omeleyo)
- I-Ultra ngeBausch kunye neLomb
Kukho i-torc (i-astigmatism yokulungisa) i-silicone i-hydrogel lens kwimarike:
- PureVision 2 Toric ngeBausch kunye neLomb
- I-Air Optix Aqua ye-Astigmatism ngu-Alcon
- Biofinity Toric ngoCopervision
Nangona ezi iilensi zixabiso elincinane kunezenzi zendabuko, zibonelela ngeenzuzo ezongezelelweyo kubaphathi.
Ngoko ingxabano iyaqhubeka: Ngaba kungcono ukusebenzisa kwakhona i-lens ekufuneka ikhutshelwe i-lens kwaye igcinwe kwiimeko ezinokuba ziinqambi ezinobungozi okanye ukulahla i-lens yonke imihla? Ukuphila komntu wonke, i-biochemistry kunye ne-physiology ihluke, ngoko oko kusebenza kwisigulane esinye asikwazi ukusebenza kolu hlobo. Cela ubugcisa bakho bezamehlo ngcebiso.
Umthombo: Sindt, Christine W., OD Silicone Hydrogel Iinkcukacha zoqhagamshelwano. Ukuhlaziywa kwe-Optometry, Septemba 2007.