Lens ya Blue Block, tuyita kandi Lens ya Cut Cut cyangwa UV420.Kandi ifite ubwoko bubiri butandukanye bwubururu bwubururu, bumwe ni ibikoresho byubururu bwubururu, ubu bwoko ni uguhagarika urumuri rwubururu kubintu; undi urimo kongeramo ibara ry'ubururu. guhagarika urumuri rwubururu. Abakiriya benshi bahitamo ibikoresho byubururu byubururu, kuko bihendutse kandi byoroshye kugenzura imikorere yabyo, gusa ikaramu yubururu yubururu irahagije.