Iine chikamu munzvimbo yezasi ye lens, bifocal lens inoratidza maviri akasiyana dioptric masimba, ayo anopa varwere kuona kwakajeka pedyo uye kure.
Pasinei nechikonzero chaunoda kunyorerwa kuti uone padhuze kugadzirisa, bifocals ese anoshanda nenzira imwechete. Chikamu chidiki muchikamu chepasi chelenzi chine simba rinodiwa kugadzirisa chiono chako chiri pedyo. Iyo yakasara yelenzi kazhinji ndeye yako yekuona chinhambwe. Iyo lens segment yakatsaurirwa kune pedyo nekugadziriswa kwechiratidzo inogona kuve imwe yeakawanda maumbirwo.