Evidence map›Paper›PMID 40613950›Full record

ArticleInternational ophthalmology2025

The accuracy of VRF intraocular lens power calculation formula in cataract patients after radial keratotomy.

Zhao-Xing Guo, Xin Zheng, Peng Zhao, Zhi-Yong Tian, Xiu-Hua Wan, Meng Li

Abstract read
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In one paragraph

Article in International ophthalmology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
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1 · What the graph read from it

What it found

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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

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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

2 citing papers in PubMed.

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4 · The record

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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

6 authors.

Zhao-Xing GuoBeijing Ophthalmology & Visual Sciences Key Laboratory, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China.
Xin ZhengBeijing Ophthalmology & Visual Sciences Key Laboratory, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China.
Peng ZhaoBeijing Ophthalmology & Visual Sciences Key Laboratory, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China.
Zhi-Yong TianBeijing Ophthalmology & Visual Sciences Key Laboratory, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China.
Xiu-Hua WanBeijing Ophthalmology & Visual Sciences Key Laboratory, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China. xiuhuawan@126.com.
Meng LiBeijing Ophthalmology & Visual Sciences Key Laboratory, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China. drlimeng@mail.ccmu.edu.cn.

Funding

National Natural Science Foundation of China 82171037
6 · The paper itself

Abstract

purposeTo investigate the accuracy of the VRF intraocular lens (IOL) power calculation formula in cataract patients after radial keratotomy (RK).

methodsThis was a retrospective study that reviewed and retrieved the medical history of patients after RK who underwent cataract surgery from April 1, 2021, to December 31, 2024, at Beijing Tongren Hospital. A total of 50 eyes of 27 patients were included. The absolute error (AE, the absolute value of the difference between the actual Spherical Equivalent after cataract surgery and the Equivalent Spherical predicted by the IOL formulas) and the percentage of eyes with AE within 0.5D, 0.75D, 1.0D, and 2.0D were calculated by using three formulas: the VRF formula, the Kane formula and the Barrett True-K No History formula and were compared.

resultsThere was a significant difference in AE values between the three formulas (X

conclusionFor this cohort of patients with cataract after RK, the VRF formula was the most accurate, and the Kane formula also demonstrated good accuracy. Both formulas can be tried to be applied to predict IOL power in patients with cataract after RK in future clinical practice.

Indexed as

CataractCataract ExtractionKeratotomy, RadialLenses, IntraocularLens Implantation, IntraocularOptics and PhotonicsRefraction, OcularVisual AcuityAgedBiometryFemaleHumansMaleMiddle AgedRetrospective StudiesAbsolute errorCataractIOL power calculationRadial keratotomy

Identifiers

PMID40613950

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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.