US Patent 9855139 Intraocular lens delivery systems and methods of use

An apparatus for deploying an intraocular lens into an eye including a fluid delivery device that includes a fluid passageway extending to a proximal end of the fluid delivery device, the fluid passageway adapted to allow a fluid to flow therethrough from the proximal end of the fluid delivery device to within the fluid passageway, and a side vent that is not an intraocular lens delivery port, the side vent disposed proximal to an intraocular lens and adapted to vent air when fluid flows through the fluid passage, wherein the side vent is adapted to resist the flow of a viscoelastic material therethrough.