Izindaba - Amalensi abantu abaneminyaka ephakathi kanye nabantu asebekhulile

Iyini i-presbyopia?

"I-Presbyopia" iyisimo esivamile sokuphila futhi ihlobene ne-lens.I-crystalline lens iyanwebeka.Inokuqina okuhle lapho isencane.Iso lomuntu liyakwazi ukubona eduze nakude ngokuguqulwa kwelensi eyikristalu.Kodwa-ke, njengoba iminyaka ikhula, i-crystalline lens iyaqina kancane kancane futhi ishube, bese ukuqina kuyancipha.Ngesikhathi esifanayo, ikhono lokufinyela lemisipha ye-ciliary liyancipha.Amandla okugxila we-eyeball nawo azokwehla, futhi indawo yokuhlala izokwehla, futhi i-presbyopia iyenzeka ngalesi sikhathi.

Ayini amalensi athuthukayo wabantu abadala?

Amalensi esivame ukuwagqoka amalensi ajwayelekile e-monofocal, angabona kuphela kude noma eduze.Ngakolunye uhlangothi, amalensi athuthukayo abantu abadala anezindawo eziningi okugxilwe kuzo, ingxenye engaphezulu yelensi isetshenziselwa ukubona kude futhi ingxenye engezansi isetshenziselwa ukubona eduze.Kunoshintsho oluncane kancane ukusuka emandleni ebangeni ngaphezu kwelensi ukuya emandleni aseduze angaphansi kwelensi ngoshintsho oluncane kancane lwamandla acwebezelayo.

Amalensi aqhubekayo ngezinye izikhathi abizwa ngokuthi "no-line bifocals" ngenxa yokuthi awanawo lo mugqa we-bifocal obonakalayo.Kodwa amalensi aqhubekayo anomklamo we-multifocal othuthuke kakhulu kunama-bifocal noma ama-trifocal.
Amalensi enqubekela phambili e-Premium (njengama-Varilux lens) ngokuvamile ahlinzeka ngokunethezeka okungcono kakhulu nokusebenza, kodwa kukhona nezinye izinhlobo eziningi.Uchwepheshe wakho wokunakekelwa kwamehlo angaxoxa nawe ngezici nezinzuzo zamalensi akamuva aqhubekayo futhi akusize uthole amalensi angcono kakhulu ezidingo zakho ezithile.

Amandla amalensi aqhubekayo ashintsha kancane kancane ukusuka kwelinye iphuzu kuya kwelinye endaweni engaphezulu, enikeza amandla afanele
ukubona izinto ngokucacile kunoma yiliphi ibanga.
Ama-Bifocals, ngakolunye uhlangothi, anamandla amalensi amabili kuphela - elokubona izinto ezikude ngokucacile kanye namandla esibili ngaphansi.
ingxenye yelensi yokubona ngokucacile ebangeni elishiwo lokufunda.Ukuhlangana phakathi kwalezi zindawo zamandla ezihluke ngokusobala
kuchazwa "umugqa we-bifocal" obonakalayo onqamula phakathi nendawo yelensi.

Izinzuzo Zelensi Eqhubekayo

Ngakolunye uhlangothi, amalensi aqhubekayo, anamandla amaningi amalensi amaningi kunama-bifocals noma ama-trifocal, futhi kuba noshintsho oluncane kancane lwamandla ukusuka kwelinye iphuzu kuye kwelinye endaweni yonke yelensi.

Idizayini ye-multifocal yamalensi aqhubekayo inikeza lezi zinzuzo ezibalulekile:

* Inikeza umbono ocacile kuwo wonke amabanga (kunokuba kube amabanga wokubuka amabili noma amathathu kuphela ahlukene).

* Iqeda "ukugxuma kwesithombe" okukhathazayo okubangelwa ama-bifocals nama-trifocals.Yilapho izinto zishintsha khona kungazelelwe ekucaceni nasekumeni okusobala lapho amehlo akho enyakaza emigqeni ebonakalayo kulawa lens.

* Ngenxa yokuthi awekho "imigqa ye-bifocal" ebonakalayo kumalensi aqhubekayo, akunikeza ukubukeka kobusha kunama-bifocal noma ama-trifocal.(Lesi sizathu sisodwa kungase kube ukuthi kungani abantu abaningi namuhla begqoka amalensi aqhubekayo kunenombolo egqoke ama-bifocal nama-trifocal ehlangene.)

Isikhathi sokuthumela: Oct-14-2022