Evidence map›Paper›PMID 33007274›Full record

ArticleAmerican journal of ophthalmology2021

Incidence, Incident Causes, and Risk Factors of Visual Impairment and Blindness in a Rural Population in India: 15-Year Follow-up of the Andhra Pradesh Eye Disease Study.

Rohit C Khanna, Srinivas Marmamula, Pooja Pendri, Asha Latha Mettla, Pyda Giridhar, Seema Banerjee, Konegari Shekhar, Subhabrata Chakrabarti, Gudlavalleti V S Murthy, Clare Gilbert and 2 more

Abstract readMulticenter Study
PubMed Publisher
In one paragraph

Article in American journal of ophthalmology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 11% 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.

  1. Barriers and Enablers to Seeking Eye Care Among the Adult Indian Population: A Systematic Review.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

12 authors at 3 institutions in 3 countries.

Rohit C KhannaAllen Foster Community Eye Health Research Centre, Gullapalli Pratibha Rao International Centre for Advancement of Rural Eye Care, L V Prasad Eye Institute, Hyderabad, India; Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute Banjara Hills, Hyderabad, India; University of Rochester, School of Medicine and Dentistry, Rochester, New York, USA. Electronic address: rohit@lvpei.org.
Srinivas MarmamulaAllen Foster Community Eye Health Research Centre, Gullapalli Pratibha Rao International Centre for Advancement of Rural Eye Care, L V Prasad Eye Institute, Hyderabad, India; Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute Banjara Hills, Hyderabad, India.
Pooja PendriDepartment of Ophthalmology, New York Presbyterian Hospital / Weill Cornell Medical College, New York, New York, USA.
Asha Latha MettlaAllen Foster Community Eye Health Research Centre, Gullapalli Pratibha Rao International Centre for Advancement of Rural Eye Care, L V Prasad Eye Institute, Hyderabad, India; Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute Banjara Hills, Hyderabad, India.
Pyda GiridharAllen Foster Community Eye Health Research Centre, Gullapalli Pratibha Rao International Centre for Advancement of Rural Eye Care, L V Prasad Eye Institute, Hyderabad, India; Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute Banjara Hills, Hyderabad, India.
Seema BanerjeeAllen Foster Community Eye Health Research Centre, Gullapalli Pratibha Rao International Centre for Advancement of Rural Eye Care, L V Prasad Eye Institute, Hyderabad, India.
Konegari ShekharAllen Foster Community Eye Health Research Centre, Gullapalli Pratibha Rao International Centre for Advancement of Rural Eye Care, L V Prasad Eye Institute, Hyderabad, India; Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute Banjara Hills, Hyderabad, India.
Subhabrata ChakrabartiProf. Brien Holden Eye Research Centre, L V Prasad Eye Institute Banjara Hills, Hyderabad, India.
Gudlavalleti V S MurthyInternational Centre for Eye Health, Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom; Indian Institute of Public Health, Hyderabad, India.
Clare GilbertInternational Centre for Eye Health, Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Gullapalli N RaoAllen Foster Community Eye Health Research Centre, Gullapalli Pratibha Rao International Centre for Advancement of Rural Eye Care, L V Prasad Eye Institute, Hyderabad, India; Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute Banjara Hills, Hyderabad, India.
Andhra Pradesh Eye Disease Study Group
L V Prasad Eye Institute · INLondon School of Hygiene & Tropical Medicine · GBNewYork–Presbyterian Hospital · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo report 15-year incidence rate of visual loss (blindness and visual impairment [VI]), causes, and risk factors for participants in Andhra Pradesh Eye Disease Study III (APEDS III).

designPopulation-based cohort study.

methodsFrom 2012 to 2016, all rural participants were interviewed and underwent a comprehensive eye examination, including dilated fundus examination and imaging. Presenting visual acuity (PVA) and best-corrected visual acuity (BCVA) were measured using a standard logarithm of Minimum Angle of Resolution chart at 3 meters. World Health Organization (WHO) and United States of America (USA) categories of VI and blindness were used. Incident visual loss was defined as the development of or worsening of visual loss of one or more categories.

resultsIn APEDS I, 7,771 rural participants were examined using stratified, random-cluster systematic sampling; in APEDS III, 5,395 participants (69.4% of rural or 52.4% of total participants) were re-examined. Using WHO categories, the crude incidence rate of any visual loss based on PVA and BCVA were 14.6 (95% confidence interval [CI]:13.6-15.7) and 6.3 (95% CI: 6.1-6.4) per 100 person-years, respectively. Using USA criteria, the values were 22.6 (95% CI: 22.3-23.0) and 10.6 (95% CI: 10.3-10.8) per 100 person-years, respectively. More than 90% of visual loss was attributable to cataract and uncorrected refractive error. Using WHO categories, significant independent risk factors for the incident visual loss were increasing age, female gender, illiteracy, past or current smoker, and current use of alcohol. Using the USA definition, an additional risk factor was lower level of education.

conclusionsThe high incidence likely reflects poor access to eye care in this population, which needs to be taken into account when planning eye care programs.

Indexed as

ForecastingPopulation SurveillanceRural PopulationVisual AcuityAdolescentAdultAgedAged, 80 and overAge DistributionBlindnessChildChild, PreschoolFemaleFollow-Up StudiesHumansIncidence

Identifiers

PMID33007274
OpenAlexW3090099272

What OpenQuestion holds

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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.