Ngemuva kweminyaka engama-40, abesifazane bavame ukuhlakulela ubude obude noma i- presbyopia . Lesi sifo sibonakala ngokunciphisa ukuqina kwe-lens iso, ngenxa yokuthi lilahlekelwa ikhono layo lokushintsha ngokushesha ukuma kwalo futhi linikeze umbono ocacile kunoma iyiphi ibanga. Uma usebenzisa izibuko, kufanele uthenge amabhangqa amaningana, isibonelo, ngokufunda, imisebenzi yansuku zonke, ukusebenza kwikhompyutha.
Ama-lenti wokuxhumana aphezulu ayingxenye engcono kunazo zonke izibuko zokulungisa amehlo. Zihlelwe ngendlela yokuthi elinye lamalensi likuvumela ukuba ubone ngokucacile izinto ezikude. Kuye ngezidingo, kunezinhlobonhlobo ezinhlobonhlobo zezilinganiso ezinjalo.
Ungakhetha kanjani amalensi oxhumana nabo amaningi?
Ungathenga amalensi afanele ukulungisa i-presbyopia kuphela emva kokubonisana nomuntu ophthalmologist. Ngesikhathi sokwamukelwa, udokotela uzoqaphela ukuthi zingaki izingxenye ze-optical kufanele kube ukugxila ezintweni ezingafani.
Ukukhethwa kwamalensi okuxhumana amaningi ayenziwe phakathi kwezinhlobo zamadivayisi alandelayo:
- Bifocal. Ama-lens aguquguqukayo anama-optical 2 angama-optical, engxenyeni engezansi - yokubuka okucacile eduze, endaweni engaphezulu - ngokugxila ezintweni ezikude.
- I-Concentric. Ezingxenyeni ezinjalo, izingxenye ezimbili ze-optical zihlelwe ezizungeze ukuzungeza kusukela phakathi kuya endaweni ehamba phambili.
- Aspherical. Lezi lens zibhekwa njengeziphambili kakhulu futhi ziqhubekayo. Ngombono oseduze, indawo ephakathi yokuvula ihloselwe. Kusuka kuso kuya emaphethelweni wedivayisi, amandla okuphikisa ahluka kancane kancane, okwenza kube lula ukubona hhayi kude kuphela nakuseduze, kodwa futhi nasezindaweni eziphakathi.
Kunzima ukukhetha izindlela zokulungisa ukubuka amehlo, njengoba zinezinhlobonhlobo ezahlukene - ukushintshwa kwendabuko, ukuhlelwa kabusha kanye namalensi oxhumana nabo abaningi ngosuku olulodwa. Ngaphezu kwalokho, ubunzima bezinto eziphathekayo kubalulekile, isibonelo, kukhona ama-silicone-hydrogel, ama-rigid, nama-hydrophilic.
I-lens yokuxhumana ephezulu kakhulu ye-multitifocal
Ama-lensi anconyiwe alolu hlobo kufanele abe yi-gesi engenakulinganiswa ukuhlinzeka ngokukhululekile kokuphefumula kwe-oksijini emehlweni, futhi abe nomswakama ophezulu wokuvimbela ukoma, ukucasuka nokukhala .
Imikhiqizo elandelayo ye-lens multifocal ihlangabezana nezidingo ezibalwe:
- I-CIBA Vision Alcon Air Optix Multifocal;
- I-Bausch + Lomb PureVision2 Ye-Presbyopia;
- I-Sauflon Clariti Multifocal;
- I-Bausch + Lomb Soflens Multi-Focal;
- CooperVision Biofinity Multifocal;
- I-Bausch + Lomb PureVision Multi-Focal;
- UMark'ennovy Xtensa Multifocal;
- I-CooperVision i-UV Multifocal i-Rhythmic.
Amagama wedivayisi okukhulunywe ngenhla ahloswe ukugqoka isikhathi eside ngokushintshwa okuhleliwe. Iningi lazo lenziwe ngezinto eziphathekayo ezinamandla, zinekhono eliphezulu lokugcina umswakama kanye nefilimu evikelayo emehlweni, vumela ukudlula oksijini.
Uma udinga ukuthatha izesekeli zosuku olulodwa, kufanele uqaphele ama-lenti amaningi oxhumana nabo ama-lens Clariti 1 Day Multifocal kusuka ku-Sauflon no-Proclear 1 Day Multifocal kusuka ku-CooperVision. Okunye okunekhwalithi enhle yi-Alcon Dailies AquaComfort Plus Multifocal, eyenziwe yi-CIBA Vision.
Iphakheji ngayinye iqukethe amaphuzu angu-30 ama-lens ahloselwe ukushintshwa nsuku zonke. Inzuzo yalolu hlobo lokulungiswa kombono ukuhlanzeka kwabo. Ngaphezu kwalokho, le mikhiqizo yama-lens multitifocal ine-wettability ebusweni obuhle kakhulu, evikela iso ekumeni.