Results 21 to 30 of about 212,491 (313)
PLoS ONE, 2022 IntroductionGlobally, the prevalence of refractive error was 12%, and visual impairment due to refractive error was 2.1%. In sub-Saharan Africa, the prevalence of refractive error and visual impairment due to refractive error was 12.6% and 3.4 ...
Daniel Atlaw +15 more
doaj +1 more source
Application of big-data for epidemiological studies of refractive error.
PLoS ONE, 2021 PurposeTo examine whether data sourced from electronic medical records (EMR) and a large industrial spectacle lens manufacturing database can estimate refractive error distribution within large populations as an alternative to typical population surveys ...
Michael Moore +5 more
doaj +1 more source
Journal of Lumbini Medical College, 2021 Introduction: The most common visual disorder in school age children is refractive error globally. The present study aimed to know the prevalence of refractive errors and explore the factors associated with the refractive error in school-age children in ...
Keshav Raj Bhandari +3 more
doaj +1 more source
Assessment of Refractive Status of 5-15 Years Old Children Attending Government Schools of Rural Agra [PDF]
Healthline, 2022 Introduction: In children uncorrected refractive errors have a profound effect on educational and psychosocial development hence it is necessary to estimate the prevalence both at the community and at the school level to aid planning and implementation ...
Himanshu Kumar Yadav +4 more
doaj +1 more source
Stereoacuity after photorefractive keratectomy in myopia
Journal of Current Ophthalmology, 2016 Purpose: Stereopsis, as a part of visual function, is the ability of differentiating between the two eyes' views (binocular disparity), due to the eyes' different positions.
Siamak Zarei-Ghanavati +4 more
doaj +1 more source
Super-Dispersive Demultiplexer Design Using Positive-Negative Refraction Boundary and Hetero-Photonic Crystals [PDF]
, 2022 In this paper, a systematic approach is employed to design a photonic crystal with a boundary between positive and negative refraction to boost the refractive properties of the crystal. Mathematical techniques are employed to turn the process of EFC engineering into a nearly mechanical process free of trial-and-error steps.
arxiv +1 more source
JAMA: The Journal of the American Medical Association, 1895 These eighteen propositions will assist the beginner to more readily understand the many pages treating of the same subjects in all our text-books. With a second lecture on the lenses which correct the errors of refraction, and a third lecture on the frames which hold the lenses which correct the errors of refraction, we will have completed the "House
openaire +2 more sources
Indian Journal of Ophthalmology, 2012 Global estimates indicate that more than 2.3 billion people in the world suffer from poor vision due to refractive error; of which 670 million people are considered visually impaired because they do not have access to corrective treatment. Refractive errors, if uncorrected, results in an impaired quality of life for millions of people worldwide ...
Kovin Naidoo, Jyoti Jaggernath
openaire +3 more sources
Profile of refractive error in Ekiti, south western Nigeria
African Vision and Eye Health, 2018 Background: Refractive error is one of the eye disorders with the capability of causing visual impairment. We needed to know the various types and proportion of refractive errors seen in patients attending an eye clinic at the tertiary health centre ...
Iyiade A. Ajayi +2 more
doaj +1 more source
PLoS ONE, 2021 BackgroundRefractive error is one of the commonly encountered problems during pregnancy and being the cause of deleterious effects on health. Despite its impacts, there is no evidence on the magnitude and associated factors of refractive error among ...
Mengistie Diress +6 more
doaj +1 more source