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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
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IOL power calculation after corneal refractive surgery.

Maddalena De Bernardo1, Luigi Capasso2, Luisa Caliendo1

  • 1Department of Medicine and Surgery, University of Salerno, Via Salvatore Allende1, Baronissi, 84081 Salerno, Italy.

Biomed Research International
|August 20, 2014
PubMed
Summary
This summary is machine-generated.

Calculating intraocular lens (IOL) power after corneal refractive surgery (CRS) is challenging. This review identifies formulas to improve IOL power accuracy in post-CRS eyes, recommending methods with proven success in large patient groups.

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Biomedical Engineering

Background:

  • Corneal refractive surgery (CRS) alters corneal curvature, complicating intraocular lens (IOL) power calculations.
  • Accurate IOL power calculation is crucial for achieving desired refractive outcomes post-cataract surgery.

Purpose of the Study:

  • To systematically review and describe formulas designed to address the challenges of IOL power calculation in patients previously undergoing CRS.
  • To categorize existing methods based on their reliance on patient historical data.

Main Methods:

  • A comprehensive literature search of PubMed was conducted using keywords related to IOL power calculation and CRS.
  • Reference lists of retrieved articles were also reviewed to identify additional relevant studies.
  • A total of 33 peer-reviewed articles were included in the analysis.

Main Results:

  • The reviewed literature identified 33 methods for calculating IOL power in post-CRS eyes.
  • Methods were categorized into two main groups: 18 requiring patient clinical history and 15 not requiring it.
  • The history-dependent group was further subdivided into five categories based on specific parameters used.

Conclusions:

  • Formulas that have demonstrated reliable results across a large number of patients are recommended for use.
  • Averaging results from multiple validated methods may enhance predictive accuracy.
  • Adopting robust calculation methods can help prevent refractive surprises and improve patient satisfaction.