Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Age-related prevalence and met need for correctable and uncorrectable near vision impairment in a multi-country study
Ophthalmology, Volume 121, No. 1, Year 2014
Notification
URL copied to clipboard!
Description
Purpose To estimate the prevalence, potential determinants, and proportion of met need for near vision impairment (NVI) correctable with refraction approximately 2 years after initial examination of a multi-country cohort. Design Population-based, prospective cohort study. Participants People aged ≥35 years examined at baseline in semi-rural (Shunyi) and urban (Guangzhou) sites in China; rural sites in Nepal (Kaski), India (Madurai), and Niger (Dosso); a semi-urban site (Durban) in South Africa; and an urban site (Los Angeles) in the United States. Methods Near visual acuity (NVA) with and without current near correction was measured at 40 cm using a logarithm of the minimum angle of resolution near vision tumbling E chart. Participants with uncorrected binocular NVA ≤20/40 were tested with plus sphere lenses to obtain best-corrected binocular NVA. Main Outcome Measures Prevalence of total NVI (defined as uncorrected NVA ≤20/40) and NVI correctable and uncorrectable to >20/40, and current spectacle wearing among those with bilateral NVA ≤20/63 improving to >20/40 with near correction (met need). Results Among 13 671 baseline participants, 10 533 (77.2%) attended the follow-up examination. The prevalence of correctable NVI increased with age from 35 to 50-60 years and then decreased at all sites. Multiple logistic regression modeling suggested that correctable NVI was not associated with gender at any site, whereas more educated persons aged >54 years were associated with a higher prevalence of correctable NVI in Nepal and India. Although near vision spectacles were provided free at baseline, wear among those who could benefit was <40% at all but 2 centers (Guangzhou and Los Angeles). Conclusions Prevalence of correctable NVI is greatest among persons of working age, and rates of correction are low in many settings, suggesting that strategies targeting the workplace may be needed. © 2014 by the American Academy of Ophthalmology.
Authors & Co-Authors
He, Mingguang
China, Guangzhou
Zhongshan Ophthalmic Center
Abdou, Amza
Nigeria, Niamey
Programme National de Lutte Contre la Cecite Ministere de la Sante Publique
Ellwein, Leon B.
United States, Bethesda
National Eye Institute Nei
Naidoo, Kovin Shunmugan
South Africa, Durban
University of Kwazulu-natal
Sapkota, Yuddha Dhoj
Nepal, Kathmandu
Nepal Netra Jyoti Sangh
Thulasiraj, Ravilla Duraisamy
India, Madurai
Aravind Eye Care System
Varma, Rohit
United States, Los Angeles
University of Southern California
Zhao, Jialiang
China, Beijing
Peking Union Medical College Hospital
Kocur, Ivo
Switzerland, Geneva
Organisation Mondiale de la Santé
Congdon, Nathan Greenleaf
China, Guangzhou
Zhongshan Ophthalmic Center
United States, New York
Orbis International
Statistics
Citations: 28
Authors: 10
Affiliations: 10
Identifiers
Doi:
10.1016/j.ophtha.2013.06.051
e-ISSN:
15494713
Research Areas
Health System And Policy
Study Design
Cross Sectional Study
Cohort Study
Study Approach
Quantitative
Study Locations
Niger
South Africa