2MD, Department of Opthalmology, Balikesir University School of Medicine, Balikesir, Türkiye
3MD, Department of Ophthalmology, Okan University School of Medicine, İstanbul, Türkiye
4MD, Department of Ophthalmology, Ulucanlar Eye Training and Research Hospital, Ankara, Türkiye
5MD, Department of Ophthalmology, Balikesir State Hospital, Balikesir, Türkiye DOI : 10.37844/glau.cat.2023.18.22 Purpose: To investigate the factors that affect the decrease in intraocular pressure (IOP) after cataract surgery.
Materials and Methods: Single-center, retrospective, observational case series. Preoperatively, lens thickness (LT), anterior chamber depth (ACD), angle open distance (AOD), lens vault (LV), iris curvature (IC) and iris thickness (IT) were measured. Pressure/depth ratio (PDR), ACD/LT ratio and lens position (LP) were calculated. Pre- and post-surgical IOP were analyzed as absolute value difference and percent change. The effect of each parameter on IOP change was evaluated with a linear regression model.
Results: Forty-four eyes of 44 patients (23 female, 52.2%) were analyzed. The mean IOP decreased from 17.47±2.99 mmHg to 15.11±2.34 mmHg in the second postoperative month (p <0.001). The absolute IOP difference was 2.36±1.52 mmHg, and the percent change was 0.13±0.07 %. According to the multivariate linear regression analysis, preoperative IOP and ACD/LT were significant predictors of absolute IOP change (p<0.004, p=0.016, respectively, R2=68.5%). According to the percent IOP change, only preoperative IOP was significant (p=0.031, R2=58.6%).
Conclusion: Preoperative IOP and ACD/LT ratio are essential indicators of intraocular pressure change in the non-glaucomatous patient group after cataract surgery. It may be essential to consider these factors for clinical follow-up in patients with a significant reduction in intraocular pressure following cataract surgery.
Keywords : Angle opening distance, Anterior chamber depth, Intraocular pressure reduction, Lens thickness, Pressure/depth ratio