Results 61 to 70 of about 60,613 (227)

Visual impairment and refractive error in school children in Bhutan: The findings from the Bhutan School Sight Survey (BSSS 2019).

open access: yesPLoS ONE, 2020
PurposeTo estimate the nationwide prevalence of visual impairment and associated refractive error in school children in Bhutan.MethodsThe sample of this prospective cross-sectional national survey comprised of randomly selected classes in levels IV-IX ...
Indra Prasad Sharma   +8 more
doaj   +2 more sources

Association between Refractive Error Types and Asthenopia in Primary School Students

open access: yesMajalah Kedokteran Bandung, 2021
Refractive error is a condition in which the cornea and lens fail to focus the light, resulting in reduced visual efficiency. Twelve million children are experiencing refractive errors worldwide and uncorrected refractive errors in children have been ...
Vanessa Kuswanto   +2 more
doaj   +1 more source

Prevalence and risk factors of uncorrected refractive error among an elderly Chinese population in urban China: a cross-sectional study [PDF]

open access: yesBMJ Open, 2018
Objectives To investigate the prevalence and risk factors of uncorrected refractive error (URE) in an elderly urban Chinese population in China. Design A population-based cross-sectional study.
Ye H   +7 more
europepmc   +2 more sources

Refractive error in school children in Agona Swedru, Ghana

open access: yesAfrican Vision and Eye Health, 2010
Uncorrected refractive errors remains a public health problem among different population groups. Among schoolchildren, uncorrected refractive errors have a considerable impact on learning andacademic achievement especially in underserved and under ...
G. O. Ovenseri-Ogbomo, R. Assien
doaj   +1 more source

Two-dimensional Bragg grating lasers defined by electron-beam lithography [PDF]

open access: yes, 2006
Two-dimensional Bragg grating (2DBG) lasers with two quarter-wave slip line defects have been designed and fabricated by electron-beam lithography and reactive ion etching.
Choi, John M.   +5 more
core   +1 more source

Cost–benefit analysis of screening programme for diabetic retinopathy in Bulgaria

open access: yesBritish Journal of Clinical Pharmacology, EarlyView.
Aims Late‐diagnosed diabetic retinopathy (DR) is difficult and expensive to treat. Screening programmes can identify the disease early and reduce the costs of its future treatment. This study aims to analyse the cost–benefit of screening programmes for DR.
Iva Nenkova   +5 more
wiley   +1 more source

Driving Innovation: The Impact of National Health Policies on Optometry Research in East Asia

open access: yesThe International Journal of Health Planning and Management, EarlyView.
ABSTRACT This study examines the optometric research landscape in three East Asian countries—China, Japan, and Korea—analysing how research trends align with each country's national health strategies. By evaluating published articles and reviews from national journals between 2006 March 2025, we identify key areas of focus, including paediatric ...
Jihye Ahn, Moonsung Choi
wiley   +1 more source

Prevalence of vision impairment and refractive error in school learners in Calabar, Nigeria

open access: yesAfrican Vision and Eye Health, 2019
Background: Uncorrected refractive error could negatively affect learning and academic performance, there is still inadequate information for planning school health.
Anne E. Ebri   +2 more
doaj   +1 more source

The prevalence and causes of vision loss in indigenous and non-indigenous Australians [PDF]

open access: yes, 2017
Purpose: To conduct a nationwide survey on the prevalence and causes of vision impairment and blindness in Indigenous and non-Indigenous Australians. Design: Nationwide, cross-sectional, population-based field survey.
Ang, Ghee S.   +10 more
core   +1 more source

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