Evidence map›Paper›PMID 33692402›Full record

ArticleScientific reports2021

A multicenter study of interocular symmetry of corneal biometrics in Chinese myopic patients.

Guihua Xu, Yijun Hu, Shanqing Zhu, Yunxiang Guo, Lu Xiong, Xuejun Fang, Jia Liu, Qingsong Zhang, Na Huang, Jin Zhou and 4 more

Open access · goldAbstract readMulticenter Study
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.6field-weighted citation impact, top 10% of its field
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

17 citing papers in PubMed, 26 citations in OpenAlex.

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  4. Prevalence of interocular symmetry in corneal astigmatism and the possible influence of age, sex and refractive error.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025
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  8. Enhanced morphological assessment based on interocular asymmetry analysis for keratoconus detection.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024
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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

14 authors at 4 institutions in 2 countries.

Guihua XuDepartment of Ophthalmology, Huizhou Municipal Central Hospital, Huizhou, China.
Yijun HuAier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China. huyijun2014@163.com.ORCID 0000-0002-6424-7905
Shanqing ZhuAier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China.
Yunxiang GuoAier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China.
Lu XiongAier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China.
Xuejun FangAier School of Ophthalmology, Central South University, Fourth Floor, New Century Mansion, 198 Middle Furong Road, Changsha, 410015, China.
Jia LiuRefractive Surgery Center, Shenyang Aier Eye Hospital, Shenyang, China.
Qingsong ZhangRefractive Surgery Center, Wuhan Aier Eye Hospital, Wuhan, China.
Na HuangRefractive Surgery Center, Wuhan Aier Eye Hospital, Wuhan, China.
Jin ZhouRefractive Surgery Center, Chengdu Aier Eye Hospital, Chengdu, China.
Fangfang LiRefractive Surgery Center, Chengdu Aier Eye Hospital, Chengdu, China.
Xiaohua LeiRefractive Surgery Center, Hankou Aier Eye Hospital, Hainan, China.
Li JiangRefractive Surgery Center, Hankou Aier Eye Hospital, Hainan, China.
Zheng WangAier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China.
Anyang Eye Hospital · CNCentral South University · CNSun Yat-sen University · CNHuizhou Central People's Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It is essential to know the normal range of the interocular symmetry of the cornea (ISC) for keratoconus diagnosis and corneal substitutes design. In the present study we investigated the interocular symmetry of corneal biometrics in 6,644 Chinese myopic patients from multiple ophthalmic centers. Corneal biometrics of both eyes were exported from the Pentacam instrument. Interocular symmetry of the corneal biometrics was analyzed by Spearman's correlation test, intraclass correlation coefficient (ICC) analysis and Bland-Altman plot. Significantly strong interocular correlations were found in anterior and posterior corneal curvatures, corneal diameter, corneal thickness, corneal volume, corneal eccentricity, and corneal asphericity (r = 0.87-0.98, all P < 0.001). Moderate interocular correlations were observed in whole corneal astigmatism (r = 0.78) and posterior corneal astigmatism (r = 0.73). ICC between the right and left eyes was 0.94-0.98 for anterior and posterior corneal curvatures, corneal diameter, corneal thickness and corneal volume, 0.80-0.88 for corneal eccentricity and asphericity, and 0.73-0.79 for corneal astigmatism (all P < 0.001). Bland-Altman plot showed that the 95% limit of agreement between both eyes was narrow and symmetric in most of the corneal biometrics, suggesting strong interocular agreements in these corneal biometrics. In conclusion, significant interocular symmetry of corneal biometrics is observed in Chinese myopia patients. Extra attention should be paid to patients with interocular corneal asymmetry.

Indexed as

Corneal TopographyAdolescentAdultAstigmatismCorneaFemaleHumansKeratoconusMaleMyopia

Identifiers

PMID33692402
PMCPMC7946893
OpenAlexW3135662003

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.