Evidence map›Paper›PMID 29879937›Full record

ArticleBMC ophthalmology2018

Comparison of the MyoRing implantation depth by mechanical dissection using PocketMaker microkeratome versus Melles hook via AS-OCT.

Shiva Pirhadi, Neda Mohammadi, Seyed Aliasghar Mosavi, Hashem Daryabari, Hossein Aghamollaei, Khosrow Jadidi

Open access · goldAbstract read
In one paragraph

Article in BMC ophthalmology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
0.7field-weighted citation impact, top 28% 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

4 citing papers in PubMed, 5 citations in OpenAlex.

  1. Intracorneal ring segment implantation for eyes with keratoconus and corneas thinner than 400 microns.Medical hypothesis, discovery & innovation ophthalmology journal · 2025
    Article
  2. Article
  3. Article
  4. Observational
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

6 authors at 4 institutions in 1 country.

Shiva PirhadiDepartment of Biomedical Engineering, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran.
Neda MohammadiDepartment of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Seyed Aliasghar MosaviVision Health Research Center, Semnan University of Medical Sciences, Semnan, Iran.
Hashem DaryabariDepartment of Ophthalmology, Baqiyatallah University of Medical Sciences, Tehran, Iran.
Hossein AghamollaeiVision Health Research Center, Semnan University of Medical Sciences, Semnan, Iran.
Khosrow JadidiDepartment of Ophthalmology, Baqiyatallah University of Medical Sciences, Tehran, Iran. kh.jadidi@gmail.com.
Baqiyatallah University of Medical Sciences · IRSemnan University of Medical Sciences · IRIslamic Azad University, Science and Research Branch · IRTehran University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThis paper seeks to evaluate the depth and outcomes of MyoRing implantation using two mechanical dissection procedures including: PocketMaker microkeratome in opposition to the Melles hook method.

methodsThis retrospective study was carried out on 39 eyes of 38 keratoconus patients (28 male and 10 female) with the mean age of [Formula: see text] years and had undergone MyoRing implantation by the two mentioned methods. The MyoRing was inserted into the corneal pocket which was made manually in 18 eyes (Melles hook group) or with PocketMaker microkeratome in 21 eyes (PocketMaker group). The mean follow up time was [Formula: see text] months with pre-operative and post-operative ophthalmic examination including uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), keratometry readings and central corneal thickness measurement. AS-OCT (Casia, SS-1000, Tomey, Nagoya, Japan) imaging was used to measure MyoRing insertion depth, exactly.

resultsPre-operative and post-operative UCVA (LogMAR) mean change for the PocketMaker and Melles hook groups were recorded at 0.75 ± 0.32 and 0.78 ± 0.33, respectively. Similarly, BCVA (LogMAR) mean change were 0.27 ± 0.22 and 0.23 ± 0.22. Mean keratometry (Kmean) change were 6.06 ± 4.18 and 6.56 ± 3.55 respectively. UCVA change (P = 0.767), BCVA change (P = 0.77) and Kmean change (P = 0.693) showed that there was no statistically significant difference between both groups for any parameter. Depth measurements achieved from AS-OCT images showed that there was no statistically significant difference in pocket depth between two methods of MyoRing implantation (P = 0.413).

conclusionsThe results of Myoring implantation outcomes using mechanical dissection via PocketMaker microkeratome as against Melles hook are comparable.

Indexed as

Visual AcuityAdolescentAdultCorneaCorneal TopographyEquipment DesignFemaleHumansKeratoconusMaleMiddle AgedOphthalmologic Surgical ProceduresProstheses and ImplantsProsthesis ImplantationRefraction, OcularRetrospective StudiesCorneaIntracorneal ringsKeratoconusMelles hookPocketMaker microkeratome

Identifiers

PMID29879937
PMCPMC5992749
OpenAlexW2805856143

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.