Nta mpungenge - ibyo ntibisobanura ko ugomba kwambara ibintu bidashimishije cyangwa amahanga. Kubantu benshi, lens ituje umurongo yubusa ni amahitamo meza cyane.
Lens igenda itera imbere?
Lens Lens ntabwo ari umurongo wa multifocal eyeglass ijisho risa neza nkuko lens imwe. Muyandi magambo, lens zigenda zitera imbere zizagufasha kubona neza intera zose zitabanje kubara (kandi zisobanura) "imirongo ya bifocal" igaragara muri binificals na thifacals.
Imbaraga zo mu bwoko bwiterambere buhoro buhoro kuva kumurongo kugeza kuri lens hejuru, zitanga imbaraga zikwiye zo kubona ibintu neza muburyo bumwe.
Ku rundi ruhande, bifcals, ifite imbaraga ebyiri za lens - imwe yo kubona ibintu bya kure n'imbaraga za kabiri mugice cyo hepfo ya lens kugirango zibone kure. Ihuriro riri hagati yibi bice bitandukanye byamashanyarazi bisobanurwa na "bifocal umurongo" bikata hejuru ya lens.
Lens igenda iratera imbere, rimwe na rimwe yitwa "Nta bikoresho byo mumirongo" kuko idafite uyu murongo wa bifocal ugaragara. Ariko lens igenda itera imbere igishushanyo mbonera cyinshi cyambere kuruta bilecals cyangwa tifocali.
Lens yiterambere, mubisanzwe itanga ihumure ryiza nibikorwa byinshi, ariko hariho izindi ndabi nyinshi hamwe nimikorere yinyongera, nkamafoto yiterambere ryamafoto, ubururu butera imbere, nibikoresho bitandukanye. Urashobora kubona kimwe kuri wewe kurupapuro rwacuhttps://www.uuniumikuru.
Abantu benshi batangira gukenera ijisho ryinshi mugihe cya 40 nyuma yimyaka 40. Nigihe impinduka zisanzwe mumaso yijisho zigabanya ubushobozi bwacu bwo kubona neza. Ku muntu wese ufite preskyopia, lens igendanwa ifite inyungu zifatika kandi zo kwisiga ugereranije na bifoconali gakondo na thifacali.
Igishushanyo mbonera cy'imico cy'iterambere gitanga munsi y'inyungu zingenzi:
Itanga icyerekezo gisobanutse neza (aho kuba hafi ya kabiri cyangwa eshatu zo kureba neza).
Irakuraho amashusho "gusimbuka ishusho" biterwa na bifocal na triifocali. Aha niho ibintu bihinduka muburyo butunguranye kandi bugaragara mugihe amaso yawe yimukiye kumurongo ugaragara muriyi rembo.
Kuberako nta "imirongo igaragara" igaragara munzira ziterambere, ziguha isura nziza kuruta bilecal cyangwa thifacali. .