Itheyibhile yokuguqula i-VDT (VDT) ikwabizwa ngokuba yitafile ye-3D ye-3D, yimfundo yezonyango ye-3D kunye nesixhobo somonde. Kwakuqala kwasenzelwe ukwenza abafundi bezonyango ukuba basebenzise isidumbu sobomi bomntu.