Lens nigikoresho kibonerana gifite ubuso bumwe cyangwa bwinshi bugoramye bukozwe mubikoresho byiza nkibirahure cyangwa resin. Nyuma yo gusya, akenshi ikusanyirizwa mubirahuri hamwe nikirahure kugirango ikosore iyerekwa ryabakoresha kandi ibone umurima ugaragara.
Ubunini bwa lens ahanini bushingiye kumurongo wangiritse hamwe nurwego rwa lens. Indwara ya Myopic yoroheje hagati kandi ifite umubyimba uzengurutse impande zose, mugihe hyperopic lens itandukanye. Mubisanzwe urwego rwisumbuyeho, uburebure bwa lens; Iyo urwego rwo hejuru rwangirika, rworoshye lens