Accuracy of Three Intraocular Lens-power Formulas in Predicting Refractive Outcomes in Different Intraocular Lenses.
10.3341/jkos.2016.57.12.1891
- Author:
Sung Il KANG
1
;
Kun MOON
;
Jong Hwa JUN
Author Information
1. Department of Ophthalmology, Keimyung University School of Medicine, Daegu, Korea. junjonghwa@gmail.com
- Publication Type:Original Article
- Keywords:
Intraocular lenses;
Intraocular lens power formula;
Mean absolute error;
Mean numeric error
- MeSH:
Biometry;
Cataract;
Lenses, Intraocular*;
Medical Records;
Refractometry;
Retrospective Studies
- From:Journal of the Korean Ophthalmological Society
2016;57(12):1891-1896
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To compare the accuracy of different power-calculation formulas in predicting the postoperative refraction of three-piece and one-piece intraocular lenses (IOL). METHODS: We retrospectively reviewed the medical records of 74 eyes (62 patients) that had undergone cataract surgery involving implantation of one of two IOLs―the SENSAR® AAB00 1-Piece Acrylic IOL (44 eyes), or the Hoya® VA60BB 3-Piece Acrylic IOL (30 eyes)―between October 2014 and March 2015. Axial length was measured using an optical low-coherence refractometry (Lenstar®), and biometry was then calculated by the pre-installed Lenstar program, which used the SRK/II, Sanders-Retzlaff-Kraff/Theoretical (SRK/T), and Hoffer Q formulas. Mean absolute error (MAE) and mean numeric error (MNE) were measured 1 day, 1 week, 1 month, and 2 months after surgery. RESULTS: Using the SRK/T and Hoffer Q formulas, the one-piece IOL group differed significantly from the three-piece IOL group in terms of the MNE obtained 1 month and 2 months after surgery. Across all formulas and time points, there were no significant differences between the groups in terms of MAE. CONCLUSIONS: There was no significant difference between the different power-calculation formulas. Starting 1 month after surgery, the three-piece IOL group showed myopic postoperative refraction compared to the predictive spherical equivalent using the SRK/T and Hoffer Q formulas.
