International Ophthalmology

, Volume 37, Issue 1, pp 63–70 | Cite as

Effect of intraoperative factors on IOP reduction after phacoemulsification

  • Eva DeVience
  • Sona Chaudhry
  • Osamah J. SaeediEmail author
Original Paper

The purpose of the study was to determine the independent predictors of long-term intraocular pressure (IOP) reduction after cataract surgery with phacoemulsification. This is a retrospective review of uncomplicated cataract surgeries from 2006 to 2008 at the Baltimore VA Medical Center with longitudinal follow-up. Demographic, clinical, biometric, and intraoperative variables including phacoemulsification parameters were recorded. Univariate and multivariate linear regression were used to analyze the relationship between these variables and postoperative IOP, which was the outcome variable. Analysis was performed in 115 eyes of 115 patients who underwent uncomplicated phacoemulsification during the study period. There was an average postoperative IOP reduction through 12, 24, and 36 months of −1.7 ± 3.1, −1.5 ± 3.8, and −1.3 ± 2.6 mmHg, respectively. Higher preoperative IOP (P < 0.001), a more anterior relative lens position (P < 0.05), and longer phaco time (P < 0.05) were significantly associated with greater postoperative decrease in IOP using univariate analysis. Using multivariate analysis, preoperative IOP (P < 0.001), and phaco time (P = 0.038) were associated with greater postoperative IOP reduction through 24 months. Phaco time is independently associated with IOP reduction after adjusting for age and preoperative IOP. Higher preoperative IOP is associated with a greater IOP-lowering effect after phacoemulsification.


Phacoemulsification cataract surgery IOP Glaucoma Phaco time 



This study was supported in part by the 2015 ASCRS Foundation Research Grant. Dr. Saeedi is funded through an NIH Career Development Grant (K23EY025014-01A1).

Author contribution

Dr. DeVience takes full responsibility for the integrity of the data.

Compliance with ethical standards

Conflict of Interest

The authors declare that they have no conflict of interest.

Informed consent

Informed consent was obtained from all individual participants included in the study.


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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Eva DeVience
    • 1
  • Sona Chaudhry
    • 2
  • Osamah J. Saeedi
    • 1
    Email author
  1. 1.Department of Ophthalmology and Visual SciencesUniversity of Maryland School of MedicineBaltimoreUSA
  2. 2.Department of OphthalmologyBoston University School of MedicineBostonUSA

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