An instrument has been developed with a balloon at its tip, which is useful for surgery within the vitreous cavity. Accurate inflation is controlled by a microsyringe. As the balloon is being deflated prior to removal from the vitreous cavity, its volume occupying space is replaced by air or saline injected through one of the barrels of a double barreled cannula.
Couvillion GC, Freeman HM, Schepens CL. Vitreous SurgeryIII. Intraocular Balloon: Instrument Report. Arch Ophthalmol. 1970;83(6):713-714. doi:10.1001/archopht.1970.00990030713007