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Lens kubantu bageze mu za bukuru n'abasaza

Presbyopia ni iki?

"Presbyopia" ni ibintu bisanzwe bifatika kandi bifitanye isano na lens.Lens ya kristaline iroroshye.Ifite elastique nziza iyo ikiri nto.Ijisho ryumuntu rirashobora kubona hafi na kure binyuze mumiterere ya lens ya kristaline.Ariko, uko imyaka igenda yiyongera, lens ya kristaline igenda ikomera kandi ikabyimba, hanyuma elastique ikagabanuka.Mugihe kimwe, ubushobozi bwo kwikuramo imitsi ya ciliary buragabanuka.Imbaraga zo kwibanda kumaso nazo zizagabanuka, kandi amacumbi azagabanuka, kandi presbyopia ibaho muriki gihe.

Ni ubuhe buryo bukuze butera imbere?

Lens muri rusange twambara ni lens ya monofocal isanzwe, ishobora kubona kure cyangwa hafi.Kurundi ruhande, lens zikuze zitera imbere zifite ingingo nyinshi zibanze, hamwe nigice cyo hejuru cyinzira zikoreshwa mubyerekezo bya kure naho igice cyo hepfo gikoreshwa hafi yo kureba.Hariho buhoro buhoro kuva imbaraga zintera hejuru yinzira kugera kumbaraga zegereye munsi yinzira binyuze mubihinduka buhoro buhoro imbaraga zivunika.
Iterambere ryiterambere rimwe na rimwe ryitwa "nta-murongo bifocals" kuko badafite uyu murongo ugaragara.Ariko lens igenda itera imbere ifite igishushanyo mbonera cyiza cyane kuruta bifocals cyangwa trifocals.
Indanganturo ya progaramu itera imbere (nka Varilux lens) mubisanzwe itanga ihumure ryiza nibikorwa, ariko hariho nibindi bicuruzwa byinshi.Inzobere mu kwita ku jisho zirashobora kuganira nawe ibiranga inyungu nibyiza bigezweho bigenda bitera imbere kandi bikagufasha kubona lens nziza nziza kubyo ukeneye byihariye.
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Imbaraga zinzira zigenda zihinduka buhoro buhoro kuva kumurongo kugera kumurongo hejuru, bitanga imbaraga zukuri za lens
kubona ibintu neza hafi intera iyo ari yo yose.
Ku rundi ruhande, Bifocals ifite imbaraga ebyiri za lens - imwe yo kubona ibintu bya kure neza nimbaraga za kabiri hepfo
kimwe cya kabiri cyinzira yo kubona neza intera isomwa.Ihuriro hagati yibi bice bitandukanye byamashanyarazi
isobanurwa n "umurongo wa bifocal" ugabanya hagati yinzira.

Inyungu Ziteza imbere

Ku rundi ruhande, amajyambere atera imbere, afite imbaraga nyinshi za lens kurusha bifocals cyangwa trifocals, kandi hariho impinduka gahoro gahoro imbaraga kuva kumurongo kugera kumurongo hejuru yinzira.

Igishushanyo mbonera cya lens igenda itera imbere itanga inyungu zingenzi:

* Itanga icyerekezo gisobanutse kure cyane (aho kuba intera ebyiri cyangwa eshatu zitandukanye).

* Ikuraho "gusimbuka ishusho" iterwa na bifocals na trifocals.Aha niho ibintu bihinduka muburyo butunguranye kandi bugaragara mugihe amaso yawe yimutse hejuru yimirongo igaragara muriyi lens.

* Kuberako nta "murongo wa bifocal" ugaragara mumurongo utera imbere, baguha isura yubusore kuruta bifocals cyangwa trifocals.(Iyi mpamvu yonyine irashobora kuba impamvu abantu benshi muri iki gihe bambara lens igenda itera imbere kuruta umubare wambara bifocal na trifocals hamwe.)

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Igihe cyo kohereza: Ukwakira-14-2022
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