Results 41 to 50 of about 342,349 (349)
On the inapplicability of a negative-phase-velocity condition as a negative-refraction condition for active materials [PDF]
Microw. Opt. Technol. Lett., vol. 51, p. 1230 (2009), 2008 A negative-phase-velocity condition derived by Depine and Lakhtakia [Microwave Opt Technol Lett 41 (2004) 315] for isotropic, homogeneous, passive, dielectric-magnetic materials is inapplicable as a negative-refraction condition for active materials.
arxiv +1 more source
Cogent Medicine, 2021 To estimate the prevalence and distribution of uncorrected refractive error among school children in the Bongo District of Ghana. A descriptive cross-sectional study was conducted among 12–15-year-old children in eighteen public junior high schools in ...
Frederick A Asare, Priya Morjaria
doaj +1 more source
IEEE Access, 2022 Subjective accommodation refractive error models are essential for implementing adaptive vision correction devices that utilize varifocal optics. This article describes compact empirical models of subjective accommodative refractive errors in subjects ...
Mohit U. Karkhanis +7 more
doaj +1 more source
Inheritance of Refractive Error in Millennials [PDF]
Scientific Reports, 2020 AbstractOver the last decades, the prevalence of myopia has suddenly increased, and at this rate, half of the world’s population will be myopic by the year 2050. Contemporary behavioural and lifestyle circumstances, along with emergent technology, are thought to be responsible for this increase.
Dibyendu Pusti +4 more
openaire +2 more sources
Prevalence of refractive error in Europe: the European Eye Epidemiology (E3) Consortium [PDF]
, 2015 To estimate the prevalence of refractive error in adults across Europe. Refractive data (mean spherical equivalent) collected between 1990 and 2013 from fifteen population-based cohort and cross-sectional studies of the European Eye Epidemiology (E3 ...
Anastasopoulos, E. (Eleftherios) +33 more
core +1 more source
Stereoacuity Among Patients with Refractive Error at University of Gondar, Northwest Ethiopia
Clinical Optometry, 2021 Mikias Mered Tilahun, Mohammed Seid Hussen, Getasew Alemu Mersha, Biruk Lelisa Eticha Department of Optometry, School of Medicine, University of Gondar, Comprehensive Specialized Hospital, Gondar, EthiopiaCorrespondence: Getasew Alemu Mersha POB: 196 Tel
Tilahun MM +3 more
doaj
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
Peripheral refraction and the development of refractive error: a review [PDF]
Ophthalmic and Physiological Optics, 2010 It has been suggested that emmetropic and low-hyperopic eyes in which the refractive error in the periphery of the visual field is relatively hyperopic with respect to the axial refraction may be at greater risk of developing myopia than eyes with similar refractions but relatively myopic peripheral refractive errors.
Neil Charman, W., Radhakrishnan, Hema
openaire +4 more sources
, 2013 A cross-sectional study was undertaken in Nakuru, Kenya to assess the prevalence of refractive error and the spectacle coverage in a population aged ≥50 years.
Bastawrous, Andrew +3 more
core +1 more source