Ubumenyi buzwi bwubwoko bwibirahure bibaho ku isoko muri iki gihe
Gusoma ibirahuri:
Uburyo ikora: Ikoreshwa mugukosora presbyopia, lens yo gusoma ibirahuri ni convex lens ifasha amaso kwibanda.
Ubwoko: Indorerwamo imwe yo gusoma yibirahure, irashobora kubona hafi; Hano hari ibirahuri byo gusoma cyangwa kwibanda cyane, bishobora guhuza ibikenewe byo kubona kure no gufunga icyarimwe.
Indorerwamo z'izuba:
Imikorere: Ikoreshwa cyane cyane muguhagarika urumuri rwizuba nimirasire ya ultraviolet kugirango igabanye imbaraga no kwangirika kwizuba ryamaso.
Ibara rya Lens: Amabara atandukanye ya lens arakwiriye kubidukikije nibikorwa bitandukanye. Kurugero, ibara ryijimye ritanga ibara risanzwe kandi rikwiranye nuburyo butandukanye bwumucyo; Lens yubururu yongera itandukaniro ryamabara mugihe igabanya urumuri, ikwiranye no gutwara nandi mashusho; Ibirahuri byumuhondo byongera itandukaniro, ingaruka ziboneka nibyiza mubihe bito bito cyangwa ibicu, akenshi bikoreshwa mukubyina ski, kuroba nindi siporo.
Ibirahuri bihindura amabara:
Ihame: Lens irimo ibintu byihariye bya chimique (nka halide ya silver, nibindi), muri ultraviolet cyangwa imirasire yumucyo ikomeye bizabaho reaction yimiti, bigatuma lens ibara ryijimye; Iyo urumuri rugabanutse, reaction irahindurwa, kandi ibara rya lens rigenda ryoroha kandi rigaragara.
Ibyiza: Ikirahuri kirashobora guhuza ibikenewe gukoreshwa murugo no hanze icyarimwe, byoroshye kandi byihuse, birinda ikibazo cyo gusimbuza ibirahuri kenshi.