ReviewJournal of ophthalmology2020
Visual Impairment Prevalence, Causes, and Role of Healthcare Access: A Systematic Review and Meta-Analysis in Iran.
Review in Journal of ophthalmology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 3 of them syntheses that pooled 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.
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.
Who cites it
6 citing papers in PubMed, 3 syntheses or guidelines pooled it, 12 citations in OpenAlex.
- Mobile applications for ophthalmology: a quantitative and qualitative analysis.BMC health services research · 2026Pooled it
- Prevalence of age-related macular degeneration in Iran and its projections through 2050: a systematic review and meta-analysis.BMC ophthalmology · 2023Pooled it
- The burden of visual impairment among Ethiopian adult population: Systematic review and meta-analysis.PloS one · 2023Pooled it
- Establishing the Profile of Eye Diseases at Nkhatabay District Hospital, Malawi: A Retrospective Study.Health science reports · 2026Article
- Vision-related tasks in children with visual impairment: a multi-method study.Frontiers in psychology · 2023Article
- Development and clinimetric assessment of a performance-based functional vision tool in visually impaired children.Frontiers in pediatrics · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeHealthcare access is one of the determinants of visual impairment (VI), as a public health problem. The objective of this study was to estimate VI prevalence, related causes, and its correlation with access to physicians in Iran.
methods: This systematic review and meta-analysis include observational studies published in Iran. PubMed, Web of Science, Scopus, Google Scholar, and local databases were systematically searched by using the MeSH headings. Data on the provincial distribution of physicians, as an index of access to healthcare, was retrieved. A random-effect meta-analysis was performed to assess.
resultsEight articles were included. The pooled prevalence of blindness, low vision, and VI was 0.80% (95% CI: 0.61-0.99%), 2.92% (95% CI: 2.40-3.44%), and 5.57% (95% CI: 4.71-6.43%). Refractive errors were the most common causes of VI based on PVA with the pooled prevalence of 54.6% (95% CI: 43.4-65.8%). Based on BCVA, we found that the pooled prevalence of cataracts was 37.4% (95% CI: 29.5-45.3%) as the most common cause of VI. The results of metaregression showed that the greater number of general practitioners (GPs) (
conclusionSome of the main causes of visual impairment in Iran are preventable. Access to healthcare services may lead to early diagnosis of preventable causes of VI. Further well-designed studies and national surveys should be conducted to provide accurate data from different regions of Iran.
Identifiers
What OpenQuestion holds
Registered trials
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.