Refractive Outcomes After Cataract Surgery: Impact of Optimizing Your IOL Constant
Purpose
To determine the impact of intraocular lens (IOL) constant optimization on refractive outcomes after routine phacoemulsification.
Methods
Retrospective chart review of patients who underwent routine, phacoemulsification and implantation of SN60WF lens during 2010 and during 2013 by one surgeon (KDS). Eyes were excluded if they had preoperative pathology, target refraction other than plano, ultrasound axial length, intraoperative complications, any astigmatism correction, and previous refractive or intraocular surgery. Eyes were divided in 2 groups: Pre-IOL constant optimization and post- IOL constant optimization. Percentage of eyes within ±0.50 D and ±1.00 D of target was calculated and compared between the 2 groups. Data was analyzed using non-parametric statistical tests. P < .05 was considered statistically significant.
Results
A total of 318 eyes were included in the analysis. No significant differences in age, preoperative refraction, keratometry, anterior chamber depth, or axial length were found between the groups (P > .05, Mann-Whitney U-test). In the Pre-IOL constant optimization (n = 181), 64% were within ± 0.50 D compared to 90% in the post-IOL constant optimization group (n=137) (P = .000, Chi-square test). Ninety-six percent and 100% of cases were within 1.00 D in the pre-IOL constant optimization group and the post-IOL constant optimization group, respectively.
Conclusion
The results show the positive impact of IOL constant optimization since it significantly improves postoperative refractive outcomes.