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1.56 Semi Yarangije Bifocal Ifoto yumukara optique
Muri rusange, ibirahuri bihindura ibirahuri bya myopiya ntibishobora kuzana ubwiza nubwiza gusa ahubwo birashobora no kurwanya neza ultraviolet no kurabagirana, bishobora kurinda amaso, impamvu yo guhindura amabara nuko iyo lens ikozwe, ivangwa nibintu byumva urumuri. , nka silver chloride ya silver, igice cya silver (hamwe kizwi nka silver halide), hamwe na catisale ya miside ya oxyde.Igihe cyose igice cya feza kimurikirwa numucyo ukomeye, urumuri ruzabora kandi ruhinduke ibice byinshi bya feza byirabura bikwirakwijwe mumurongo.Kubwibyo, lens izagaragara nkaho ihagaritse kandi ihagarike inzira yumucyo.Muri iki gihe, lens izahinduka ibara, rishobora kubuza urumuri kugera ku ntego yo kurinda amaso.
