Accuracy of Preoperative IOL Master Lens Power Calculations for Artisan Aphakia Lenses in Children
Christine E. Martinez, MD; Richard P. Golden, MD
Nationwide Children’s Hospital
Introduction: The purpose of this study is to assess the accuracy of lens power calculations in the implantation of Artisan Aphakia lenses in pediatric eyes.
Methods: Retrospective comparative analysis was performed for 36 eyes of 19 pediatric patients undergoing Artisan lens implantation. Ocular biometry was performed with IOLMaster. Predicted refractive outcomes were compared to actual refractive outcomes. Mean absolute prediction errors (APE) and prediction errors (PE) were calculated.
Results: Mean patient age was 11.4 years old. 7/36 (19.4%) eyes were phakic and 29/36 (80.6%) eyes were aphakic at the time of surgery. Mean axial length was 24.17 ± 1.33 mm. The APE was lowest using Hoffer Q (0.41 ± 0.24D), followed by Holladay 1 (0.45 ± 0.30D), SRK/T (0.47 ± 0.33D), SRK II (0.53 ± 0.35D), and Haigis (1.72 ± 0.59D). The PE was closest to plano using SRK/T (-0.12 ± 0.57D), followed by Hoffer Q (0.23 ± 0.42D), Holladay 1 (0.27 ± 0.47D), SRK II (-0.33 ± 0.55), and Haigis (1.72 ± 0.62D). In phakic eyes, APE was lowest for Holladay 1 (0.18 ± 0.30D) and Hoffer Q (0.29 ± 0.27D). In aphakic eyes, APE was similar (range 0.43 – 0.52D) for all formulae except Haigis.
Discussion: Good results were obtained using Hoffer Q, Holladay 1, SRK II, and SRK/T formulae. Haigis was the least accurate formula. Holladay 1 and Hoffer Q were the most accurate in phakic eyes.
Conclusion: This study helps establish the reliability of various formulae in lens power calculations for implantation of Artisan Aphakia lenses in pediatric patients.