From the American Academy of Ophthalmology

Investigators evaluated the effect of cataract surgery on IOP in 56 patients with narrow angles and chronic angle-closure glaucoma. Mean IOP reduction in all eyes was 3.28 mm Hg (18%), with 88% experiencing a drop in IOP. IOP reduction was significantly correlated with preop IOP (r = 0.68, P < .001). In eyes with a preop IOP above 20 mm Hg, the mean decrease was 5.3 mm Hg; in the 15 mm Hg or less group, IOP decreased 1.4 mm Hg. Magnitude of IOP reduction was weakly correlated with anterior chamber depth. Journal of Cataract & Refractive Surgery, October 2014