Results 31 to 40 of about 208,047 (254)

Aberrations

open access: yes, 2016
This is an abstract portrait of me. It is graphite on paper drawn by the artist DADA obscura. His real name is Paul; he is my boyfriend, and he is a heroin addict.
Cecilia Villarruel (7105802)
core   +6 more sources

Dielectric Metalens: Properties and Three-Dimensional Imaging Applications

open access: yesSensors, 2021
Recently, optical dielectric metasurfaces, ultrathin optical skins with densely arranged dielectric nanoantennas, have arisen as next-generation technologies with merits for miniaturization and functional improvement of conventional optical components ...
Sun-Je Kim   +7 more
doaj   +1 more source

Optical Aberrations and Wavefront

open access: yes, 2014
The deviation of light to create normal retinal image in the optical system is called aberration. Aberrations are divided two subgroup: low-order aberrations (defocus: spherical and cylindrical refractive errors) and high-order aberrations (coma ...
Nihat Polat   +2 more
core   +1 more source

Do Peripheral Refraction and Aberration Profiles Vary with the Type of Myopia? - An Illustration Using a Ray-Tracing Approach

open access: yesJournal of Optometry, 2009
Purpose: Myopia is considered to be the most common refractive error occurring in children and young adults, around the world. Motivated to elucidate how the process of emmetropization is disrupted, potentially causing myopia and its progression ...
Ravi C. Bakaraju   +3 more
doaj   +1 more source

Characterization of Monochromatic Aberrated Metalenses in Terms of Intensity-Based Moments

open access: yesNanomaterials, 2021
Consistent with wave-optics simulations of metasurfaces, aberrations of metalenses should also be described in terms of wave optics and not ray tracing. In this respect, we have shown, through extensive numerical simulations, that intensity-based moments
Sorina Iftimie   +2 more
doaj   +1 more source

Central Nervous System Tumors Among Infants in Canada: A Report From CYP‐C

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Central nervous system (CNS) tumors in infants are rare, pose unique clinical challenges, and lack large‐scale evidence‐based data to guide management. This study seeks to describe CNS tumors in Canadian infants and to compare their outcomes with those of older children.
Samuel Sassine   +17 more
wiley   +1 more source

Ocular higher-order aberrations and visual performance [PDF]

open access: yes, 2011
Since adaptive optics was first used to correct the monochromatic aberrations of the eye over a decade ago there has been considerable interest in correcting the ocular aberrations beyond defocus and astigmatism.
Young, Laura Kate, YOUNG, LAURA,KATE
core  

Monocular amblyopia and higher order aberrations [PDF]

open access: yes, 2012
This study compared the corneal and total higher order aberrations between the fellow eyes in monocular amblyopia. Nineteen amblyopic subjects (8 refractive and 11 strabismic) (mean age 30 ± 11 years) were recruited.
Carney, Leo G.   +3 more
core   +1 more source

Referral Patterns and Diagnostic Timeliness in Pediatric Cancer: A Hospital‐Based Study in Indonesia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Timely diagnosis and treatment are critical for improving survival among children with cancer. In low‐ and middle‐income countries (LMICs), delays are common and may be influenced by fragmented referral pathways and diagnostic limitations.
Nur Melani Sari   +5 more
wiley   +1 more source

Third-order aberrations of pseudophakic eyes

open access: yes, 1989
The aberrations of pseudophakic eyes were analysed by third-order theory assuming thin intraocular lenses. Third-order aberrations with spherical surfaced lenses are quadratic functions of lens shape.
Atchison, David A.
core   +1 more source

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