J Korean Ophthalmol Soc.  2016 Dec;57(12):1891-1896. 10.3341/jkos.2016.57.12.1891.

Accuracy of Three Intraocular Lens-power Formulas in Predicting Refractive Outcomes in Different Intraocular Lenses

• Kang SI
• Moon K
• Jun JH

• KMID: 2362706
• DOI: http://doi.org/10.3341/jkos.2016.57.12.1891

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.

Keyword

Intraocular lenses; Intraocular lens power formula; Mean absolute error; Mean numeric error

MeSH Terms

Biometry
Cataract
Lenses, Intraocular*
Medical Records
Refractometry
Retrospective Studies

Reference

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