Fig. 4. Theoretical summary of the gas dynamics of an intravitreal SF6 gas pocket. (*, Theoretical values; ( ), experimental values; †, atmospheric pressure plus intraocular pressure 15 mm Hg; ‡, volume as measured at atmospheric pressure; §, average right-sided heart measurements plus intraocular pressure 15 mm Hg.) (From Abrams GW, Edelhauser HF, Aaberg TM, Hamilton LH: Dynamics of intravitreal sulfur hexafluoride gas. Invest Ophthal Vis Sci 13:866, 1974.)