Results 31 to 40 of about 81,454 (305)

Horizontally Inhomogeneous Ionospheric Refraction Correction for Ground-Based Radar

open access: yesAtmosphere
Atmospheric refraction often influences the localization accuracy of ground-based radar for detecting space targets. Traditional methods generally utilize the measured troposphere and ionosphere data from the local station for atmospheric refraction ...
Yunfei Zhu, Zhen Dong, Yifei Ji
doaj   +1 more source

Flavour-dependent radiative correction to neutrino-neutrino refraction

open access: yes, 2009
In the framework of the Standard Model we calculate the flavour non-universal correction for neutrino refraction in a neutrino background and verify a similar previous result for the case of ordinary-matter background.
A.D. Dolgov   +11 more
core   +1 more source

Generalized atmospheric refraction correction for optical remote sensing satellite based on rational function model

open access: yesGeo-spatial Information Science
Due to the uneven density of the Earth’s atmosphere, the light propagation path bends, destroying the collinearity condition of the ground object, camera projection center, and image point and introducing the atmospheric refraction error of optical ...
Yanli Wang   +5 more
doaj   +1 more source

EVALUATION OF CLINICAL AND FUNCTIONAL OUTCOME OF MULTIFOCAL CORRECTION BY CONTACT LENS IN PATIENTS WITH PRESBYOPIA AND MYOPIA REFRACTION

open access: yesActa Biomedica Scientifica, 2016
The aim of the study was to evaluate the effectiveness of multifocal contact lens correction in patients with presbyopia and myopic refractive error. The study involved 45 patients with myopia ranging in age from 43 to 56 years in conditions of habitual ...
N. N. Seliverstova   +2 more
doaj   +1 more source

Wavelength correction of refractivity variation measurements

open access: yesOptics Express, 2013
The index of refraction structure constant, Cn2 indicates how strongly the index of refraction varies in a region of the atmosphere. These variations usually arise through turbulent motions, creating an inhomogeneous distribution of species, density, temperature and pressure.
Lee R, Burchett, Steven T, Fiorino
openaire   +2 more sources

Optical indexes of refractive force girls' eyes at the middle school age

open access: yesZaporožskij Medicinskij Žurnal, 2015
One of leading reasons of far vision loop is forming a myopic refraction at the school age. With the purpose of estimation of the state of visual functions the following optical indexes of eyes are studies: refractive force of cornea, radius of curvature
N. V. Maryukhnich
doaj   +1 more source

Independent and reciprocal accommodation in anisometropic amblyopia [PDF]

open access: yes, 2010
Accommodation is considered to be a symmetrical response and to be driven by the least ametropic and nonamblyopic eye in anisometropia. We report the case of a 4-year-old child with anisometropic amblyopia who accommodates asymmetrically, reliably ...
Anna M. Horwood   +6 more
core   +1 more source

Cracking the Code: Which Ocular Symptoms Predict Dry Eye Signs? Insights from a large international sicca registry

open access: yesArthritis Care &Research, Accepted Article.
Purpose The study aimed to identify symptom‐based predictors of dry eye disease (DED) signs in the Sjögrens International Collaborative Clinical Alliance (SICCA) cohort. Methods Retrospective analysis examining 16 ocular symptoms (most graded 0‐4) and artificial tear (AT) use (graded 0‐3) as predictors of DED signs [abnormal ocular surface staining ...
Pragnya R Donthineni   +7 more
wiley   +1 more source

Refraction-Aware Structure from Motion for Airborne Bathymetry

open access: yesRemote Sensing
In this work, we introduce the first pipeline that combines a refraction-aware structure from motion (SfM) method with a deep learning model specifically designed for airborne bathymetry. We accurately estimate the 3D positions of the submerged points by
Alexandros Makris   +5 more
doaj   +1 more source

Under-correction of human myopia – Is it myopigenic?: A retrospective analysis of clinical refraction data

open access: yesJournal of Optometry, 2014
Purpose: To investigate retrospectively, based on routine clinical records in an optometric office, the effect of refractive under-correction of the myopic spectacle prescription on myopic progression in children and young adults.
Balamurali Vasudevan   +4 more
doaj   +1 more source

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