Results 121 to 130 of about 3,196,627 (365)
Effect of finite terms on the truncation error of Mie series
, 2012 The finite sum of the squares of the Mie coefficients is very useful for addressing problems of classical light scattering. An approximate formula available in the literature, and still in use today, has been developed to determine a priori the number of
Neves, Antonio Alvaro Ranha +1 more
core +1 more source
A STUDY ON PREVALENCE OF REFRACTIVE ERRORS IN SCHOOL CHILDREN
, 2014 ‘’Sarvendriya nam nayanam pradhanam” Of all the organs in the body, eyes are the most important. The blindness or defect in vision decreases the productivity of the nation in addition to increased dependability.
K. S. K. Murthy
semanticscholar +1 more source
Refractive Errors in 3–6 Year-Old Chinese Children: A Very Low Prevalence of Myopia?
PLoS ONE, 2013 Purpose To examine the prevalence of refractive errors in children aged 3–6 years in China. Methods Children were recruited for a trial of a home-based amblyopia screening kit in Guangzhou preschools, during which cycloplegic refractions were measured in
Weizhong Lan +6 more
semanticscholar +1 more source
ASTHENOPIA NOT DUE TO REFRACTIVE ERRORS. [PDF]
JAMA: The Journal of the American Medical Association, 1897 The inability to use apparently healthy eyes for near work, without increasing discomfort or pain, is usually caused by refractive errors, or insufficiency of accommodation. In a series of 500 patients with asthenopic complaints taken consecutively from my records, the symptoms were caused by hypermetropia, astigmatism or presbyopia in 75 to 80 per ...
openaire +3 more sources
Advanced Functional Materials, EarlyView.Herein, a comprehensive framework that enabled the optimization of colloidal solubility within a high‐dimensional parameter space and study of reversible assembly processes is developed. This data‐driven workflow integrated innovations including the robotic platform for automated AuNPs functionalization, machine learning for predicting and revealing ...
Yueyang Gao +5 more
wiley +1 more source
PLoS ONE, 2013 Purpose To examine the prevalence and risk factors of refractive errors in a representative Korean population aged 20 years old or older. Methods A total of 23,392 people aged 20+ years were selected for the Korean National Health and Nutrition Survey ...
E. Kim +4 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.This research investigates an electro‐active chiral optical response (EACOR)‐driven dual‐channel metasurfaces with fast electrical switching rates of 52 ms, and a low operating voltage of 0.5 V. The combination of polyaniline (PANI) thin film and the exceptional topological (ET) phase of chiral gold (Au) meta‐atoms modulate holographic images through ...
Jaekyung Kim +4 more
wiley +1 more source
Recovering pyramid WS gain in non-common path aberration correction mode via deformable lens
, 2017 It is by now well known that pyramid based wavefront sensors, once in closed loop, have the capability to improve more and more the gain as the reference natural star image size is getting smaller on the pyramid pin. Especially in extreme adaptive optics
Bergomi, M. +7 more
core +1 more source
Refractive error maps: A predictive tool for refractive error progression
Ophthalmic and Physiological OpticsAbstractPurposeTo investigate the influence of axial length on different ocular parameters and create a predictive tool for refractive error progression.MethodsTwo eye models were used to simulate refractive errors, namely the Liou–Brennan and the Goncharov–Dainty. Both models were simulated using Zemax OpticStudio.
Fabian Debowy, Barbara Pierscionek
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On the Best Methods of Diagnosing and Correcting the Errors of Refraction [PDF]
, 1884 H. Juler
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