Magirazi emaziso akasiyana anoita mhedzisiro dzakasiyana uye hapana lens inonyatso kufanira zviitiko zvese.Kana iwe ukapedza nguva yakawedzerwa yenguva uchiita mabasa chaiwo, akadai sekuverenga, basa redhesiki kana basa rekombuta, ungangoda basa chairo magirazi.Manyoro ekuwedzera lenzi anoitirwa seyekutanga kutsiva varwere vakapfeka lenzi imwe yekuona.Aya lenzi anokurudzirwa kune 18-40 makore ezera myopes achiona zviratidzo zvemeso akaneta.