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Refining Intraocular Lens Power Calculations With Prediction Modifications: A Multiformula Analysis in High-Power

Chung Min Lee1, Nahyun Park1, Yea Eun Lee1

  • 1From the Department of Ophthalmology (C.M.L., N.P., Y.E.L., J.H., T.K., T.Y.K., K.S.E., H.S.C., J.Y.K., and H.L.), Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.

American Journal of Ophthalmology
|November 18, 2025
PubMed
Summary
This summary is machine-generated.

Prediction modifications (PMOD) significantly improved refractive accuracy for high-power intraocular lenses (IOLs). This simple adjustment reduced prediction errors in modern IOL formulas, enhancing outcomes for cataract surgery patients.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Refractive Surgery

Background:

  • Accurate refractive prediction is crucial for successful cataract surgery outcomes.
  • High-power intraocular lenses (IOLs) present unique challenges for refractive prediction formulas.
  • Existing IOL formulas may exhibit systematic errors in high-power eyes.

Purpose of the Study:

  • To evaluate the effectiveness of prediction modifications (PMOD) in enhancing refractive accuracy.
  • To assess PMOD's impact on modern IOL formulas specifically for high-power TECNIS IOLs.
  • To determine if PMOD can reduce prediction errors in eyes with high-power IOLs.

Main Methods:

  • Retrospective analysis of 645 eyes implanted with TECNIS ZCB00 or ICB00 IOLs.
  • Eyes were stratified into central power (17.5-23.5 D) and high-power (>23.5 D) groups.
  • Twelve IOL power formulas were evaluated with and without PMOD, analyzing prediction errors (MRE, MAE, RMSAE).

Main Results:

  • Optimized constants in the central power group yielded good accuracy across formulas.
  • In the high-power group, PMOD significantly reduced mean refractive error (MRE), mean absolute error (MAE), and root mean square absolute error (RMSAE) for most formulas (P < .05).
  • PMOD effectively corrected a myopic shift observed in high-power IOLs.

Conclusions:

  • Prediction modifications (PMOD) offer a simple, diopter-specific adjustment to improve refractive prediction accuracy.
  • PMOD successfully reduced residual systematic errors in high-power IOLs across various formulas.
  • This adjustment enhances the reliability of modern IOL formulas for high-power implants.