Evidence map›Paper›PMID 36071422›Full record

Observational studyBMC ophthalmology2022

Implantable collamer lens sizing based on measurement of the sulcus-to-sulcus distance in ultrasound biomicroscopy video clips and ZZ ICL formula.

Jun Zhang, Jie Shao, Li Zheng, Xia Zhao, Shu Chen

Open access · goldAbstract readObservational Study
In one paragraph

Observational study in BMC ophthalmology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
2.2field-weighted citation impact, top 13% 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

10 citing papers in PubMed, 13 citations in OpenAlex.

  1. Repeatability of corneal diameter measured by Sirius versus IOLMaster 700 in myopic eyes: combined with consistency and relationship of sulcus-to-sulcus.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
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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

5 authors at 3 institutions in 1 country.

Jun ZhangDepartment of Ophthalmology, Hangzhou MSK Eye Hospital & MSK Eye Hospital of Hangzhou Medical College, Hangzhou, China. zhangjun@mskyk.onaliyun.com.
Jie ShaoDepartment of Ophthalmology, Hangzhou MSK Eye Hospital & MSK Eye Hospital of Hangzhou Medical College, Hangzhou, China.
Li ZhengDepartment of Ophthalmology, Hangzhou MSK Eye Hospital & MSK Eye Hospital of Hangzhou Medical College, Hangzhou, China.
Xia ZhaoDepartment of Ophthalmology, Hangzhou MSK Eye Hospital & MSK Eye Hospital of Hangzhou Medical College, Hangzhou, China.
Shu ChenDepartment of Ophthalmology, Hangzhou MSK Eye Hospital & MSK Eye Hospital of Hangzhou Medical College, Hangzhou, China.
Wenzhou Medical University · CNAffiliated Eye Hospital of Wenzhou Medical College · CNHangzhou Medical College · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo evaluate a new method of implantable collamer lens (ICL) sizing based on ultrasound biomicroscopy (UBM) video clips.

methodsThis observational study included consecutive patients with myopia and myopic astigmatism scheduled for V4c toric ICL (TICL) implantation (STAAR) at Hangzhou MSK Eye Hospital (October 2020 to November 2020). Sulcus-to-sulcus (STS) distance, lens thickness (LT), and clinical refraction were measured preoperatively. The ZZ ICL formula (provides the predicted vault height and refraction based on TICL size, intraocular meridian, power, and eye parameters, including STS distance and LT) was used to select TICL size and predict vault height and residual refraction, which was also compared with the STAAR software recommended. Vault and residual refraction were measured at 3 months postoperatively.

resultsThe analysis included 168 eyes in 84 patients. Postoperative vault size was comparable to that predicted by the ZZ ICL formula (528 ± 193 vs. 545 ± 156 μm, P = 0.227). Vault prediction error (PE) by the ZZ ICL formula was within 100, 300, and 500 μm in 40.48%, 88.10%, and 100% of eyes, respectively. Spherical equivalent (SE) and absolute cylindrical refractive error were 0.36 ± 0.48 and 0.40 ± 0.31 D at 3 months postoperatively. The SE PE, absolute cylindrical PE, and percentages of eyes with an absolute cylindrical PE within ± 0.50 D and ± 1.00 D were lower for the ZZ ICL formula than for the STAAR software (P < 0.01).

conclusionsCombining measurements obtained in UBM video clips with the ZZ ICL formula provides an effective method of sizing TICLs and predicting vault height and residual refractive error.

Indexed as

Phakic Intraocular LensesRefractive ErrorsHumansLens Implantation, IntraocularMicroscopy, AcousticVisual AcuityIntraocularLensesPhakic Intraocular LensRefractive ErrorsUltrasound Biomicroscopy

Identifiers

PMID36071422
PMCPMC9454160
OpenAlexW4294884164

What OpenQuestion holds

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LicenceCC BY
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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.