Results 21 to 30 of about 257,877 (269)
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 +2 more
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Effects of age and Refractive Errors on Stereopsis
Türk Oftalmoloji Dergisi, 2011 Pur po se: To investigate the effects of age and refractive errors on stereopsis. Ma te ri al and Met hod: The present study included 1488 cases which were randomly selected, had full vision and no eye pathology except refractive errors.
Aykut Arslan Yıldız +1 more
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Uniform refraction in negative refractive index materials [PDF]
Journal of the Optical Society of America A, 2015 We study the problem of constructing an optical surface separating two homogeneous, isotropic media, one of which has a negative refractive index. In doing so, we develop a vector form of Snell's law, which is used to study surfaces possessing a certain uniform refraction property, both in the near and far field cases. In the near field problem, unlike
Stachura, Eric, Gutirrez, Cristian E.
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Wave Trajectory Study on the Coast of Lhoknga, Aceh Besar, Indonesia: A Numerical Model Approach
Civil Engineering Dimension, 2018 A numerical model of wave trajectory using shoaling and refraction formula was proposed in the coastal waters of Lhoknga, Aceh Besar, Indonesia. The developed model used a two dimensional (2D) numerical methods for wave trajectory with the input of wave ...
Ichsan Setiawan, Mohammad Irham
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A method for creating materials with a desired refraction coefficient [PDF]
, 2009 It is proposed to create materials with a desired refraction coefficient in a bounded domain $D\subset \R^3$ by embedding many small balls with constant refraction coefficients into a given material. The number of small balls per unit volume around every
Ramm, A. G.
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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 +4 more
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Numerical simulations of negative-index refraction in wedge-shaped metamaterials [PDF]
, 2005 A wedge-shaped structure made of split-ring resonators (SRR) and wires is numerically simulated to evaluate its refraction behavior. Four frequency bands, namely, the stop band, left-handed band, ultralow-index band, and positive-index band, are ...
H. Liu +5 more
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Dynamic Refraction Stereo [PDF]
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2005 In this paper we consider the problem of reconstructing the 3D position and surface normal of points on an unknown, arbitrarily-shaped refractive surface. We show that two viewpoints are sufficient to solve this problem in the general case, even if the refractive index is unknown. The key requirements are 1) knowledge of a function that maps each point
Nigel J W, Morris, Kiriakos N, Kutulakos
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Controlling Refraction Using Sub-Wavelength Resonators
Applied Sciences, 2018 We construct metamaterials from sub-wavelength nonmagnetic resonators and consider the refraction of incoming signals traveling from free space into the metamaterial.
Yue Chen, Robert Lipton
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Российский офтальмологический журнал, 2020 Purpose. To study refractive indices in children with a predisposition to myopia and hyperopia after congenital cataract extraction and IOL implantation.Material and methods.
L. S. Khamraeva +3 more
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