Iro girazi regirazi remavara-inoshandura lens rine imwe chiyero chesirivheri chloride, sensitizer uye mhangura. Pasi pemamiriro emwenje mapfupi, inogona kuomeswa kuita maatomu esirivha uye maatomu eklorini. Maatomu eklorini haana ruvara uye maatomu esirivha ane ruvara. Kusangana kwemaatomu esirivheri kunogona kuita colloidal state, inova ndiyo yatinoona sekuti lens discoloration. Kusimba kwechiedza chezuva, maatomu esirivheri anowedzera kupatsanurwa, kusviba kunoita lenzi. Kana chiedza chezuva chisina simba, maatomu esirivha mashoma anoparadzaniswa, iyo lenzi inoreruka. Ikoko hakuna chiedza chezuva chakananga muimba, saka ma lens anova asina ruvara.