Results 61 to 70 of about 3,616,800 (230)

The Association of Central corneal thickness with Intra-ocular Pressure and Refractive Error in a Nigerian Population [PDF]

open access: yes, 2008
The purpose of this study was to determine the variation of central corneal thickness (CCT) with intraocular pressure (IOP) and spherical equivalent refractive error.
Iyamu, Eghosasere, Memeh, Misan
core   +1 more source

The prevalence of refractive errors in 6- to 15-year-old schoolchildren in Dezful, Iran

open access: yesJournal of Current Ophthalmology, 2015
Purpose To determine the prevalence of refractive errors, among 6- to 15-year-old schoolchildren in the city of Dezful in western Iran. Methods In this cross-sectional study, 1375 Dezful schoolchildren were selected through multistage cluster sampling ...
R. Norouzirad   +8 more
semanticscholar   +1 more source

Dynamical decoupling with tailored waveplates for long distance communication using polarization qubits

open access: yes, 2013
We address the issue of dephasing effects in flying polarization qubits propagating through optical fiber by using the method of dynamical decoupling. The control pulses are implemented with half waveplates suitably placed along the realistic lengths of ...
Bardhan, Bhaskar Roy   +2 more
core   +1 more source

Equations for filling factor estimation in opal matrix

open access: yes, 2005
We consider two equations for the filling factor estimation of infiltrated zinc oxide (ZnO) in silica (SiO_2) opal and gallium nitride in ZnO opal. The first equation is based on the effective medium approximation, while the second one - on Maxwell ...
Abrarov   +34 more
core   +1 more source

Global magnitude of visual impairment caused by uncorrected refractive errors in 2004.

open access: yesBulletin of the World Health Organization, 2008
Estimates of the prevalence of visual impairment caused by uncorrected refractive errors in 2004 have been determined at regional and global levels for people aged 5 years and over from recent published and unpublished surveys.
S. Resnikoff   +3 more
semanticscholar   +1 more source

Prevalence of Ocular Morbidity Among School Adolescents of Gandhinagar District, Gujarat [PDF]

open access: yes, 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
core   +1 more source

Ocular Biometric and Optical Coherence Tomography Parameters in Former Preterm Children: A Cohort Study

open access: yesJournal of Ophthalmology
Purpose. To compare biometric and optical coherence tomography parameters as well as refractive status in preterm children aged 4–8 years with or without retinopathy of prematurity (ROP), and evaluate their correlations with age and gender-matched full ...
Marzieh Najjaran   +8 more
doaj   +1 more source

Prevalence of refractive errors among school students in Ethiopia: A systematic review and meta-analysis

open access: yesSAGE Open Medicine, 2022
Objective: Refractive errors are most common ocular disorders among children and adolescents. They remain as secondary causes of avoidable blindness in impoverished areas in Africa, most notably in Ethiopia.
Bickes Wube Sume, Girma Seyoum
doaj   +1 more source

A plasmonic accuracy biosensor using a single laser diode [PDF]

open access: yes, 2016
A theoretical model was implemented to obtain the total specular reflection of a variable external multicavity for out of normal incidence and different polarisations.
Bañares Palacios, Paula
core   +1 more source

Refractive Error Development in Children with Intermittent Exotropia [PDF]

open access: yesMajallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul
Background and Objective: Intermittent exotropia is the most common type of outward deviation of the eye in childhood. The association between myopia refractive error and intermittent exotropia has been shown in very few studies. This study was conducted
F Senobari   +4 more
doaj  

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