Influence of pars plana vitrectomy for macular surgery on the medium term intraocular pressure
Fig 2
Mean IOP difference at primary and secondary endpoints, bars indicating standard error of the mean (SEM), P(3-6m) = 0.81, P(6-12m) = 0.09, P(12-24m) = 0.92.
Note that a positive fellow—study eye difference indicates a more pronounced change of IOP of the study eye relative to the fellow eye.