Evidence map›Paper›PMID 31844787›Full record

ArticleJournal of current ophthalmology2019

Repeatability of curvature measurements in central and paracentral corneal areas of keratoconus patients using Orbscan and Pentacam.

Ali Mirzajani, Amir Asharlous, Parvin Kianpoor, Ebrahim Jafarzadehpur, Abbasali Yekta, Mehdi Khabazkhoob, Hassan Hashemi

Abstract read
In one paragraph

Article in Journal of current ophthalmology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–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

6 citing papers in PubMed.

  1. Repeatability and agreement of two ocular biometers with single and dual Scheimpflug cameras in keratoconus eyes.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024
    Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
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

7 authors.

Ali MirzajaniDepartment of Optometry, Iran University of Medical Sciences, Tehran, Iran.
Amir AsharlousNoor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran.
Parvin KianpoorDepartment of Optometry, Iran University of Medical Sciences, Tehran, Iran.
Ebrahim JafarzadehpurDepartment of Optometry, Iran University of Medical Sciences, Tehran, Iran.
Abbasali YektaRefractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Mehdi KhabazkhoobDepartment of Medical Surgical Nursing, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Hassan HashemiNoor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine the repeatability of curvature measurements in 5 corneal rings (1-5 mm from the corneal center) in keratoconus (KCN) patients using the Orbscan and Pentacam and to compare the values of these devices.

methodsForty-eight patients with a definite diagnosis of KCN were included in the study. Patients with any corneal scar or active disease or a history of ocular surgery were excluded from the study. The right eye of the patients was studied three times with the Orbscan and Pentacam. The repeatability of the curvatures of 5 corneal rings (1-5 mm from the corneal center) was evaluated using the Orbscan and Pentacam, and the agreement of their values was analyzed.

resultsThe intraclass correlation coefficient (ICC) of three measurements was at least 0.94 (

conclusionsAccording to the results of this study, keratometry readings are highly repeatable in Pentacam and Orbscan devices in all corneal rings. Despite the high correlation between curvature measurements of the Orbscan and Pentacam, there was a significant statistical and clinical difference between the results of two devices in all corneal rings (except the 5-mm ring), and the curvature measurements of the Pentacam were steeper than Orbscan measurements.

Indexed as

KeratoconusKeratometric valuesOrbscanPentacamRepeatability

Identifiers

PMID31844787
PMCPMC6896424

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.