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J. Qu, H. Sasaki, H. Yaguchi, K. Nagai, A. Fujisawa, J. Kaneda, H. Yamashita, K. Sasaki, N. Takahashi; Anterior Chamber Depth and Intraocular Pressure Changes After Uneventful Phacoemulsification in Eyes Without Glaucoma . Invest. Ophthalmol. Vis. Sci. 2005;46(13):763.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To examine the effect of cataract surgery on intraocular pressure (IOP) control and anterior chamber depth (ACD) in eyes without glaucoma.Methods: 66 eyes of 45 patients (mean age 74.1±7.3 yrs) underwent phacoemulsification and intraocular lens (IOL: SA30AT, Alcon) implantation between Nov 2002 and April 2004 by the same surgeon. IOP and ACD were examined before and one month after surgery. IOP was measured by non–contact tonometer (CT–70, TOPCON). Pre and postoperative ACD was measured from the Scheimpflug slit photographs taken by the anterior eye segment analysis system (EAS 1000, NIDEK) under maximum pupil dilation. Eyes under glaucoma medication were excluded. For statistical analysis, t–test was applied. Results: Based on the median of IOP (15mmHg) and ACD before (2.5mm) surgery, the eyes were divided into 4 groups; high IOP and shallow anterior chamber (HS, 19 eyes), low IOP and shallow anterior chamber (LS, 15 eyes), high IOP and deep anterior chamber (HD, 17 eyes) and low IOP and deep anterior chamber (LD 19 eyes). The mean pre and postoperative ACD were 2.54±0.41mm and 3.99±0.33mm, respectively. The mean pre and postoperative IOP were 14.3±3.1mmHg and 12.7±3.3mmHg, respectively. ACD increased and IOP dropped significantly in all of the four groups (p<0.001). The change of ACD and IOP were 0.64±0.29mm and –3.2±2.3mmHg in HS, 1.61±0.23mm and –0.9±1.6mmHg in LS, 1.27±0.25mm and –1.5±2.5mmHg in HD and 1.25±0.29mm and –0.2±2.3mmHg in LD. The increase of ACD in groups LS and HS was significantly higher than in groups HD and LD (P<0.01), and decrease of IOP in group HS was greater than in groups LD and LS (p<0.001). Conclusions: In eyes without glaucoma, IOP decreased and ACD increased significantly following phacoemulsification and IOL implantation, especially in eyes with ACD less than 2.5mm and IOP over 15mmHg preoperatively.
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