Nta mpungenge — ibyo ntibivuze ko ugomba kwambara imyenda idafite imitako cyangwa imyenda idafite imitako. Ku bantu benshi, lenses zidafite imitako ni amahitamo meza cyane.
Indorerwamo zigenda zihinduka ni iki?
Indorerwamo zigenda zirushaho kwiyongera ni indorerwamo z’amaso zitagira umurongo ugaragara kandi zisa neza n’indorerwamo zigenda zigaragara ku buryo bumwe. Mu yandi magambo, indorerwamo zigenda zirushaho kwiyongera zizagufasha kubona neza intera iyo ari yo yose nta "mirongo ibiri" iteye ishozi (kandi igena imyaka) igaragara mu ndorerwamo zisanzwe zigenda zigaragara ku ndorerwamo ...
Imbaraga z'ama-lenses agenda ahinduka buhoro buhoro kuva ku gice kimwe kugeza ku kindi ku buso bwa lenses, bitanga imbaraga zikwiye zo kubona ibintu neza hafi ya kure iyo ari yo yose.
Ku rundi ruhande, Bifocal zifite imbaraga ebyiri gusa z'indorerwamo - imwe yo kubona ibintu biri kure neza n'indi mu gice cyo hasi cya lens yo kubona neza ku ntera runaka yo gusoma. Aho imiterere y'izi ngero z'amashanyarazi zitandukanye ihurira hagaragazwa n'umurongo ugaragara wa "bifocal" uca hagati muri lens.
Indorerwamo zigenda ziyongera, rimwe na rimwe zitwa "no-line bifocals" kuko zidafite uyu murongo ugaragara wa bifocal. Ariko indorerwamo zigenda ziyongera zifite imiterere ihanitse cyane ya multifocals kurusha bifocals cyangwa trifocals.
Lenseri nziza cyane zigenda ziyongera, akenshi zitanga ihumure ryiza kandi zikora neza, ariko hari n'izindi lenseri nyinshi n'ibindi bikorwa, nka lenseri igenda ihinduka urumuri, lenseri igenda ihinduka bluecut n'ibindi, hamwe n'ibikoresho bitandukanye. Ushobora kubona ikwiranye nawe ku rubuga rwacu.https://www.universeoptical.com/progressive-lenses-product/.
Abantu benshi batangira gukenera indorerwamo z’amaso zifite imiterere myinshi nyuma y’imyaka 40. Iki ni cyo gihe impinduka isanzwe mu jisho yitwa presbyopia igabanya ubushobozi bwacu bwo kureba neza hafi. Ku muntu wese ufite presbyopia, lenses zigenda ziyongera zifite akamaro gakomeye mu kureba no kwisiga ugereranije n’indorerwamo gakondo za bifocal na trifocal.
Imiterere ya lenses zigenda zihinduka ifite imiterere myinshi itanga inyungu z'ingenzi zikurikira:
Itanga ubushobozi bwo kureba neza intera iyo ari yo yose (aho kureba intera ebyiri cyangwa eshatu zitandukanye).
Ikuraho "gusimbuka kw'ishusho" guterwa n'ibice bibiri na bitatu. Aha niho ibintu bihinduka mu buryo butunguranye mu buryo busobanutse neza no mu mwanya ugaragara iyo amaso yawe agenda ku mirongo igaragara muri izi lenzi.
Kubera ko nta "mirongo ibiri" igaragara mu mboni z'amaso, iguha isura nziza kurusha ibiri cyangwa ibiri. (Iyi mpamvu yonyine ishobora kuba impamvu abantu benshi muri iki gihe bambara imboni z'amaso kurusha umubare w'abambara ibiri n'ibiri hamwe.)