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KMID : 0360220160570121891
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Journal of the Korean Ophthalmological Society
2016 Volume.57 No. 12 p.1891 ~ p.1896
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Accuracy of Three Intraocular Lens-power Formulas in Predicting Refractive Outcomes in Different Intraocular Lenses
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Kang Sung-Il
Moon Kun
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Abstract
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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.
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KEYWORD
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Intraocular lenses, Intraocular lens power formula, Mean absolute error, Mean numeric error
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