Fig. 10From: Vitreoretinal instruments: vitrectomy cutters, endoillumination and wide-angle viewing systemsVenturi pump. Vacuum is generated by a flow of air/gas and is transmitted into the cassette. The air inside the cassette is aspirated and flow from the cutter aspiration line reaches the cassette, as a result of the created vacuum. The flow is controlled by the vacuum levelsBack to article page