We read with interest the article by Hong et al.1 The authors studied the functional outcomes of 408 eyes that underwent combined glaucoma and cataract surgery with insertion of an intraocular lens. The eligible eyes were required to have intraocular pressures (IOPs) below 18 mm Hg during a mean (SD) follow-up of 9.2 (3.6) years. The authors conclude that, despite a seemingly equivalent mean IOP, eyes that had a higher standard deviation of IOP (SD > 2 mm Hg) during the follow-up period were more likely to progress compared with eyes that demonstrated a lower standard deviation of IOP (≤ 2 mm Hg).
Nouri-Mahdavi K, Medeiros FA, Weinreb RN. Fluctuation of Intraocular Pressure as a Predictor of Visual Field Progression. Arch Ophthalmol. 2008;126(8):1168-1169. doi:10.1001/archopht.126.8.1168