Evidence map›Paper›PMID 31028015›Full record

ArticleJournal of optometry

Normative values of visual evoked potentials in Northeastern of Iran.

Monireh Mahjoob, Javad Heravian Shandiz, Ali Mirzajani, Asieh Ehsaei, Ebrahim Jafarzadehpur

Open access · goldAbstract read
In one paragraph

Article in Journal of optometry. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.6field-weighted citation impact, top 34% 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

5 citing papers in PubMed, 11 citations in OpenAlex.

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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 2 institutions in 1 country.

Monireh MahjoobDepartment of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
Javad Heravian ShandizDepartment of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran; Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: heraviansj@mums.ac.ir.
Ali MirzajaniDepartment of Optometry, Iran University of Medical Sciences, Tehran, Iran.
Asieh EhsaeiDepartment of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran; Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Ebrahim JafarzadehpurDepartment of Optometry, Iran University of Medical Sciences, Tehran, Iran.
Mashhad University of Medical Sciences · IRIran University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeVisual evoked potentials (VEPs) provide important diagnostic information related to the functional integrity of the visual pathways. The aim of this study was to establish normative values of different components of pattern reversal VEPs on Iranian normal adult subjects.

methodsMonocular and binocular pattern reversal VEPs were recorded on 59 healthy participants (22.55±3.79 years old) using the Roland RETI system for two check sizes of 15 and 60min of arc. The measured VEP components were the latencies of N75, P100, N135 and amplitude of N75-P100.

resultsRepeated measures ANOVA showed that viewing eye condition has a significant impact on the amplitude of N75-P100 (P<0.001, F=13.89). Also, the effect of check size on the latencies of N75, P100, N135, amplitude of N75-P100 (P≤0.010), as well as the intraocular difference of P100 latency and amplitude N75-P100 (P=0.007) was significant. More specifically, the amplitude of N75-P100 in both check sizes significantly differed between gender groups (P<0.023).

conclusionAccording to the results of this study, VEPs components are affected by the stimulus size, monocular and binocular recording conditions and gender. Therefore, it is necessary to determine the normative values of VEPs in each population, so that the results could be used in clinical studies.

Indexed as

AdolescentAdultAnalysis of VarianceEvoked Potentials, VisualFemaleHumansIranMaleReaction TimeReference ValuesVision, BinocularVision, MonocularVisual PathwaysYoung AdultAmplitud de N75-P100Latencia de N75Latencia de P100N75 latencyN75–P100 amplitudeP100 latencyPattern reversal visual evoked potentialsReversión del patrón de potenciales evocados visuales

Identifiers

PMID31028015
PMCPMC6612035
OpenAlexW2941574732

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.