Results 31 to 40 of about 644,625 (390)

Does cycloplegia have a role in accurate estimation of refraction in highly myopic children

Delta Journal of Ophthalmology, 2018
Aim The aim of this study was to determine whether there is any difference between manifest and cycloplegic refractions in highly myopic children.
Ali A Ghali, Mohamed Altaher A AbdelAtty
doaj   +1 more source

Amphoteric refraction at the interface between isotropic and anisotropic media [PDF]

, 2006
It is found that the amphoteric refraction, i.e. the refraction can be either positive or negative depending on the incident angles, could occur at a planar interface associated with a uniaxially anisotropic positive index media (PIM) or an anisotropic ...
Feise, Foteinopoulou, Garcia, Gomez-Santos, Grzegorczyk, Hailu Luo, Haiying Liu, Hooft, Houck, Hu, Jing Zhu, Lindel, Liu, Luo, Notomi, Pacheco, Parazzoli, Pendry, Pendry, Pendry, Pendry, Shelby, Smith, Smith, Smith, Smith, Smith, Valanju, Valanju, Veselago, Wei Hu, Williams, Xunong Yi, Yariv, Zhang   +34 more
core   +2 more sources

Observation of negative refraction of Dirac fermions in graphene [PDF]

Nature Physics, 2015
Negative refraction has now been observed for Dirac fermions in graphene, and is used to create an electronic Veselago lens. Half a century ago, Veselago1 proposed ‘left-handed’ materials with negative permittivity and permeability, in which waves ...
Gil-Ho Lee, Geon-Hyoung Park, Hu-Jong Lee   +2 more
semanticscholar   +1 more source

The perspective of optometry students of the Phelophepa train regarding its role in developing experiential skills

African Vision and Eye Health, 2009
Purpose: The optometry degree programme in South Africa currently includes a combination of both theoretical and clinical modules.  The optometric skills required by graduates are often achieved by students’ involvement in clinical training at both in ...
R. Hansraj
doaj   +1 more source

Short-term refractive and ocular parameter changes after topical atropine

Taiwan Journal of Ophthalmology, 2020
PURPOSE: The purpose of this study is to explore short-term refractive and ocular parameter changes and their correlations after cycloplegia with atropine.
Min-Chieh Ho, Yi-Ting Hsieh, Elizabeth P Shen, Wei-Cherng Hsu, Han-Chih Cheng   +4 more
doaj   +1 more source

EFFECT OF SOLAR ECLIPSES ON RADIOWAVE PROPAGATION IN THE TROPOSPHERE [PDF]

Радиофизика и электроника, 2015
Energy of solar eclipses significantly influences the variation of geophysical fields and leads to a change of processes in the subsystems of the Earth and to disturbance of the existing interactions between them. Observations of each solar eclipse allow
I. M. Mytsenko, D. D. Khalameyda
doaj   +1 more source

Essential Infantile Esotropia: A Course of Treatment From Our Experience

Frontiers in Pediatrics, 2021
Background: Essential infantile esotropia (EIE) is the most common type of childhood esotropia. Although its classical approach is surgical, less invasive techniques have been proposed as an adjunct or alternative to traditional surgery.
Stefano Pensiero, Laura Diplotti, Marianna Presotto, Luca Ronfani, Egidio Barbi, Egidio Barbi   +5 more
doaj   +1 more source

Autorefraction, Retinoscopy, Javal’s Rule, and Grosvenor’s Modified Javal’s Rule: The Best Predictor of Refractive Astigmatism

Journal of Ophthalmology, 2016
The aim of the study was to determine the level of agreement between Javal’s rule, autorefraction, retinoscopy, and refractive astigmatism and to determine which technique is the most suitable substitute when subjective refraction is not applicable using
Kofi Asiedu, Samuel Kyei, Emmanuel Ekow Ampiah   +2 more
doaj   +1 more source

Refraction Correction for Spectrally Derived Bathymetry Using UAS Imagery

Remote Sensing, 2023
Spectrally derived bathymetry (SDB) algorithms are rapidly gaining in acceptance and widespread use for nearshore bathymetric mapping. In the past, refraction correction could generally be ignored in SDB, due to the relatively small fields of view (FOVs)
Selina E. Lambert, Christopher E. Parrish   +1 more
doaj   +1 more source

Standard Analytical Methods, Sensory Evaluation, NIRS and Electronic Tongue for Sensing Taste Attributes of Different Melon Varieties

Sensors, 2019
Grafting by vegetables is a practice with many benefits, but also with some unknown influences on the chemical composition of the fruits. Our goal was to assess the effects of grafting and storage on the extracted juice of four orange-fleshed Cantaloupe ...
Dzsenifer Németh, Gábor Balázs, Hussein G. Daood, Zoltán Kovács, Zsanett Bodor, John-Lewis Zinia Zaukuu, Viktor Szentpéteri, Zoltán Kókai, Noémi Kappel   +8 more
doaj   +1 more source