Ubwoko bubiri busanzwe bwa Er: Lazeri yikirahure, imwe ikoresha laser inkoni nkigikoresho gikora, ikindi ikoresha guhuza er: ikirahure kugirango ubone inyungu ziciriritse, Q-swith nibisohoka hamwe muri rusange, byerekana ibyiza byo gukosora byoroshye kandi bihamye kubaka.
Nkuko bigaragara ku buryo bukurikira: