Mubisanzwe, hari ubwoko butandatu bwurutonde rwimikorere ya resin lens: 1.50, 1.56, 1.60, 1.67, 1.71 na 1.74. Niba ushaka indangagaciro yo hejuru, ushobora gutekereza gusa ibirahuri by'ibirahure, bifite 1.80 na 1.90 guhitamo. Ni uko ibirahuri by'ibirahuri bikoreshwa gake muriyi minsi, nubwo impapuro z'ibirahure nazo zifite ibimenyetso byo hasi, nka 1.60 na 1.71.