Comparison of Three Intraocular Lens Power Calculation Formulas Using a New Swept Source Optical Coherence Tomography Biometer

DOI Web Site 13 References Open Access

Bibliographic Information

Other Title
  • 新しい光学式眼内寸法測定装置による3種の眼内レンズ度数計算式の比較

Search this article

Description

<p>[Purpose] To compare the refractive prediction errors of three formulas for intraocular lens (IOL) power calculation with a new swept-source optical coherence tomography (SS-OCT) biometer (ARGOS) that uses individual refractive index for axial length measurement.</p><p>[Patients and Methods] Subjects were 144 eyes of 144 patients who had undergone cataract surgery with no intra- or postoperative complications. Using measurements obtained by the ARGOS, the refractive prediction errors of the SRK/T, Haigis, and Barrett Universal II (BU II) formulas were compared at postoperative 3 months. The IOL constants applied were optimized by the IOLMaster® 500.</p><p>[Results] Mean refractive prediction errors (average ± standard deviation) using the SRK/T, Haigis and BUIIformulas were -0.22 ± 0.42 diopters (D), -0.08 ± 0.37 D, and -0.12 ± 0.34 D, respectively. Significant differences were seen among the three formulas (p = 0.0071). The refractive prediction error with the Haigis formula was significantly smaller than that with the SRK/T formula (p = 0.0059). The median absolute refractive prediction errors (MedAE) for the SRK/T was 0.32 D, for Haigis was 0.25 D and for BUIIformulas was 0.23 D. The refractive prediction error with the BU II was significantly smaller than those with the SRK/T (p = 0.0032) and Haigis (p = 0.04) formulas. No significant difference in the percentage of eyes with a postoperative prediction error within ±0.5 D (p = 0.077) or ±1.0 D (p = 0.289) was seen among the 3 formulas. In eyes with long axial length, the refractive prediction error with the Haigis formula (-0.12 D) was significantly smaller (p = 0.02) than those with the SRK/T (-0.36 D, p = 0.0279) and the BUII(-0.24 D, p = 0.0061). </p><p>[Conclusion] With the ARGOS that uses the individual refractive index for axial length, all three formulas for IOL power calculation showed relatively small prediction errors in this study. However, a myopic shift in eyes with long axial length should be considered.</p>

Journal

References(13)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top