Evidence map›Paper›PMID 37698825›Full record

ReviewOphthalmology and therapy2023

Intraocular Lens Power Calculation Formulas-A Systematic Review.

Wiktor Stopyra, Achim Langenbucher, Andrzej Grzybowski

Abstract readReview
In one paragraph

Review in Ophthalmology and therapy, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 3 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

73 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
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  6. Article
  7. Accuracy of 11 intraocular lens power calculation formulas in short eyes.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
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  9. Same Defocus, Different Vision: The Role of Astigmatism Type in Pseudophakic Visual Acuity Loss.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
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13 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Wiktor StopyraMW-Med Eye Centre, 31-416, Cracow, Poland. wiktorstopyra@gmail.com.ORCID http://orcid.org/0000-0002-3919-8339
Achim LangenbucherDepartment of Experimental Ophthalmology, Saarland University, 66421, Homburg, Germany.ORCID http://orcid.org/0000-0001-9175-6177
Andrzej GrzybowskiInstitute for Research in Ophthalmology, Foundation for Ophthalmology Development, 61-553, Poznan, Poland. ae.grzybowski@gmail.com.ORCID http://orcid.org/0000-0002-3724-2391

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe proper choice of an intraocular lens (IOL) power calculation formula is an important aspect of phacoemulsification. In this study, the formulas most commonly used today are described and their accuracy is evaluated.

methodsThis review includes papers evaluating the accuracy of IOL power calculation formulas published during the period from January 2015 to December 2022. The articles were identified by a literature search of medical and other databases (PubMed/MEDLINE, Crossref, Web of Science, SciELO, Google Scholar, and Cochrane Library) using the terms "IOL formulas," "Barrett Universal II," "Kane," "Hill-RBF," "Olsen," "PEARL-DGS," "EVO," "Haigis," "SRK/T," and "Hoffer Q." Twenty-nine of the most recent peer-reviewed papers in English with the largest samples and largest number of formulas compared were considered.

resultsOutcomes of mean absolute error and percentage of predictions within ±0.5 D and ±1.0 D were used to evaluate the accuracy of the formulas. In most studies, Barrett achieved the smallest mean absolute error and PEARL-DGS the highest percentage of patients with ±0.5 D in short eyes, while Kane obtained the highest percentage of patients with ±0.5 D in long eyes.

conclusionsThe third- and fourth-generation formulas are gradually being replaced by more accurate ones. The Barrett Universal II among vergence formulas and Kane and PEARL-DGS among artificial intelligence-based formulas are currently most often reported as the most precise.

Indexed as

Barrett Universal II formulaIntraocular lens power calculation formulasKane formulaPEARL-DGS formulaPhacoemulsification

Identifiers

PMID37698825
PMCPMC10640516

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.