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Updated: Jun 26, 2025

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
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Accuracy of the Majority Voting Method with Multiple IOL Power Formulae.

Yukihito Kato1, Takashi Kojima1,2, Akeno Tamaoki3

  • 1Chukyo Eye Clinic, Nagoya, Aichi, Japan.

Clinical Ophthalmology (Auckland, N.Z.)
|May 20, 2024
PubMed
Summary

A new algorithm combining intraoperative aberrometry (IA) and IOL formulas improved refractive accuracy. IA showed particular benefit in long eyes, optimizing outcomes for cataract surgery patients.

Keywords:
axial lengthcataractintraocular lens power calculationmultifocal intraocular lensoptimum visual acuity

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Refractive Surgery

Background:

  • Accurate intraocular lens (IOL) power calculation is crucial for achieving desired refractive outcomes after cataract surgery.
  • Existing IOL formulas have limitations, especially in eyes with atypical axial lengths.
  • Intraoperative aberrometry (IA) offers real-time refractive data to refine IOL selection.

Purpose of the Study:

  • To evaluate the efficacy of a novel majority decision algorithm integrating intraoperative aberrometry (IA) with two IOL formulas.
  • To compare the refractive prediction accuracy of IA, SRK/T, and Barrett Universal II (BUII) formulas.
  • To determine the optimal IOL power for achieving emmetropia in eyes implanted with TFNT lenses.

Main Methods:

  • A total of 145 eyes were analyzed, utilizing preoperative data from IOLMaster 700 and intraoperative data from ORA SYSTEM.
  • Refractive prediction error (RPE) was calculated as the difference between predicted refraction (PR) and postoperative subjective refraction.
  • Postoperative visual acuity of ≥0.8 at 3 months was confirmed for all participants.

Main Results:

  • The majority decision algorithm demonstrated effectiveness in reducing postoperative refractive error.
  • Overall, 78.7% of eyes achieved refraction within ±0.25 D.
  • Intraoperative aberrometry (IA) showed a notable advantage in eyes with long axial lengths (≥26.00 mm), with 68% within ±0.25 D RPE.

Conclusions:

  • The developed majority decision algorithm effectively reduces postoperative refractive error.
  • Intraoperative aberrometry (IA) integration is particularly beneficial for optimizing IOL power in long eyes.
  • This algorithm holds potential for enhancing IOL power selection, improving patient quality of life and clinical outcomes.