Results 51 to 60 of about 186,716 (131)
Imaging point sources in heterogeneous environments
, 2019 Imaging point sources in heterogeneous environments from boundary or far-field measurements has been extensively studied in the past. In most existing results, the environment, represented by the refractive index function in the model equation, is ...
Ren, Kui, Zhong, Yimin
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Spectacle wearing in children randomised to ready-made or custom spectacles, and potential cost savings to programmes: study protocol for a randomised controlled trial. [PDF]
, 2016 BACKGROUND: Uncorrected refractive errors are the commonest cause of visual impairment in children, with myopia being the most frequent type. Myopia usually starts around 9 years of age and progresses throughout adolescence.
Evans, Jennifer +3 more
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Oftalʹmologiâ, 2017 The review presents an analysis of the literature data on the methods of surgical correction of residual refractive error after cataract phacoemulsification. Keratorefractive and intraocular approaches are considered in details.
K. B. Pershin +4 more
doaj +1 more source
Prevalence of Ocular Morbidity Among School Adolescents of Gandhinagar District, Gujarat [PDF]
, 2011 Objective: To study the prevalence of ocular morbidity (abnormal condition) and various factors affecting it among school attending adolescents. Methods: A cross-sectional study was conducted to study abnormal ocular conditions like refractive errors ...
Chudasama, Rajesh K +4 more
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Prevalence and risk factors for myopia among school children in Aba, Nigeria
African Vision and Eye Health, 2017 Aim: To study the prevalence of myopia among school children in Aba, Nigeria. Methods: This cross-sectional study was conducted in public and private (primary and secondary) schools.
Uchenna C. Atowa +2 more
doaj +1 more source
The Contact Lens Impact on Quality of Life (CLIQ) questionnaire: development and validation [PDF]
, 2009 NoPURPOSE. To develop and validate a questionnaire for the measurement of the impact of contact lenses on quality of life (QoL): The Contact Lens Impact on Quality of Life (CLIQ) Questionnaire. METHODS. The questionnaire was developed and validated using
Elliott, David B. +2 more
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, 2006 AIM: To estimate the prevalence and causes of blindness and visual impairment in the population aged 40 years and over in Muyuka, a rural district in the South West Province of Cameroon.
Befidi-Mengue, R +4 more
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Ophthalmic disorders among students of School for the Deaf [PDF]
, 2012 Aim: This study aimed at determining the prevalence and pattern of ophthalmic disorders amongstudents of School for the Deaf, Akure, Ondo State, Nigeria.Methodology: This is a cross sectional descriptive study was conducted in October, 2011 aspart of ...
O, Adeniji A +2 more
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Effect of refractive error on temperament and character properties
International Journal of Ophthalmology, 2015 AIM: To determine the effect of refractive error on temperament and character properties using Cloninger’s psychobiological model of personality. METHODS: Using the Temperament and Character Inventory (TCI), the temperament and character profiles of 41
Emine Kalkan Akcay +7 more
doaj +1 more source
Non-perturbative approach to high-index-contrast variations in electromagnetic systems
, 2005 We present a method that formally calculates \emph{exact} frequency shifts of an electromagnetic field for arbitrary changes in the refractive index. The possible refractive index changes include both anisotropic changes and boundary shifts.
Ballentine +20 more
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