Udumo alukona nje ukuqinisekiswa nokudumisa, kodwa futhi luyisisusa esingapheli sokukhuthaza abantu ukuthi baphokophelele phambili futhi baphokophelele inqubekelaphambili.Indondo yokhuni eqoshwe nge-laser iyisipho esikhethekile sokuhlonipha.
Izakhi zokhuni zibonisa ukuvela kokuphila.Isihlahla ngasinye sincishiswa yisikhathi, futhi umusa wemvelo uyahunyushwa.Inqubo yokuqopha nge-laser ixhumanisa ubuchwepheshe nemvelo.Imikhiqizo yokhuni eqoshwe nge-laser i-concave futhi i-convex futhi ivela emvelweni, Iphila ngokuvumelana nohambo lwayo ngokuhamba kwesikhathi.
Indondo yokhuni yenziwe ngeCombas Wood ephakeme kakhulu.Uhlamvu lwezinkuni lucacile futhi ukushiswa kuthambile, kukhiphe iphunga elimnandi lezinkuni.Njengoba nje imizamo yakho ikhipha amandla okukhanya.Hlanganisa i-laser eqoshiwe esezingeni eliphezulu ne-Combas Wood ukuze uzenzele eyakho indebe ekhethekile.
Ukudweba nge-laser kusebenzisa "amabhulashi" amahle kakhulu ukuze kuzuzwe okuphambili kuyo yonke imininingwane.Phakathi kwamayintshi, ukuqoshwa kwe-laser ngokucophelela, kuphela ukuqopha udumo olungasoze lwabuna.