Twese tuzi ko lens igira uruhare runini mubirahuri bikwiye, mugihe rero duhisemo lens, tugomba guhitamo dukurikije akazi, ibyo dukeneye mubuzima hamwe nakazi dukora. Kurugero, abanyeshuri, abashoferi, abaganga, nibindi, abantu nkabo bafite ibyerekezo byinshi bisabwa kugirango ibara nintera.
Kubwibyo, mugihe uhisemo lens, utagira ibara kandi utagaragara neza.