Evidence map›Paper›PMID 29279656›Full record

SynthesisMiddle East African journal of ophthalmology

Prevalence and Major Causes of Visual Impairment in Iranian Adults: A Systematic Review.

Seyed-Farzad Mohammadi, Ghasem Saeedi-Anari, Elham Ashrafi, Seyed-Mehrdad Mohammadi, Farshad Farzadfar, Alireza Lashay, Hassan Hashemi

Abstract readSystematic Review
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Middle East African journal of ophthalmology. 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
–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

10 citing papers in PubMed.

  1. Economic Burden of Vision Loss and Eye Disorders in Iran.Iranian journal of public health · 2023
    Article
  2. Article
  3. Review
  4. Article
  5. Review
  6. The History of Trachoma in Iran.Journal of current ophthalmology
    Article
  7. Article
  8. Article
  9. Review
  10. 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.

Seyed-Farzad MohammadiEye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Ghasem Saeedi-AnariEye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Elham AshrafiEye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Seyed-Mehrdad MohammadiEye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Farshad FarzadfarNoncommunicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
Alireza LashayEye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Hassan HashemiNoor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe purpose of this study is to provide a pooled estimate of moderate-to-severe visual impairment (MSVI) and blindness in Iran for people 50 years and over and to identify the major causes through systematic review. MATERIALS AND

methodsInternational (PubMed, ISI Web of Science, and Scopus) and national databases (Scientific Information Database, Barakat Knowledge Network System, Iran Databank of Ophthalmology Research, and Magiran) databases were searched. Following relevance assessment and critical appraisal, eight studies were included. A funnel plot was drawn to explore the stability for estimation. Single-variable meta-regression analysis was applied for heterogeneity assessment, and a random effect model was used (but no significant source for the observed heterogeneity was found).

resultsAge-standardized pooled estimate of MSVI was 4.24% (95% confidence interval [CI]: 2.92-5.56); 3.98% (95% CI: 2.37-5.59) for men, and 4.08% (95% CI: 2.95-5.21) for women. Blindness (visual acuity <3/60) prevalence was 1.31% (95% CI: 1.23-1.39); 0.96% (95% CI: 0.89-1.03) for men, and 1.13% (95% CI: 1.06-1.20) for women. Causes of visual impairment (VI) were cataract (40.23%), amblyopia (12.03%), corneal opacity (9.63%), age-related macular degeneration (9.31%), diabetic retinopathy (4.94%), and glaucoma (3.67%).

conclusionVI prevalence in the 50 years and older population in Iran seems significantly better than the corresponding global estimates. A rough 60% rate of treatable VI was estimated, mostly attributable to unoperated cataract.

Indexed as

BlindnessDatabases, FactualEye DiseasesFemaleHumansIranMalePersons with Visual DisabilitiesPrevalenceSocial PerceptionVision, LowCausesIranprevalencesystematic reviewvisual impairment

Identifiers

PMID29279656
PMCPMC5698990

What OpenQuestion holds

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LicenceCC BY-NC-SA
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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.