Amashanyarazi asubirwamo LED

Ibirahuri bya Presbyopic, bizwi kandi nk'ibirahuri bya presbyopique, ni ubwoko bw'ibicuruzwa byiza, ibirahuri ku bantu barwaye presbyopiya, biri mu ndiba ya convex.Gusoma ibirahuri ahanini ni uguhuza ibyifuzo byabantu barwaye presbyopiya.Gusoma ibirahuri bikoreshwa mukuzuza icyerekezo cyabantu bageze mu za bukuru n'abasaza.Kimwe n'ibirahuri bya myopiya, hari ibimenyetso byinshi bya optique biteganijwe n'ibipimo by'igihugu, kandi hariho n'amategeko yihariye yo gukoresha.Gukoresha ibirahuri byo gusoma bigira uruhare runini mukuzamura imibereho yabantu.Hariho ubwoko butatu bwingenzi bwo gusoma ibirahuri kumasoko, aribyo iyerekwa rimwe, iyerekwa kabiri hamwe niterambere ryinshi.Intumbero imwe yo kureba irashobora gukoreshwa gusa kubona hafi, kandi ugomba gukuramo ibirahuri iyo ubonye kure.Bifocals isobanura ko igice cyo hejuru cyinzira zikoreshwa mukureba kure, naho igice cyo hepfo yinzira zikoreshwa mukureba hafi, ariko ubu bwoko bwibirahure byo gusoma bifite ibintu byo gusimbuka, kandi isura ntabwo ari nziza.Lens igenda itera imbere irashobora guhuza ibyifuzo byintera zitandukanye kure, hagati na hafi, kandi isura nayo ni nziza cyane.