Results 101 to 110 of about 41,813 (308)

Peripheral refraction and myopia progression after 36 months of orthokeratology wear in schoolchildren

open access: yesAfrican Vision and Eye Health
Background: Orthokeratology (Ortho-K) effectively slows axial elongation in myopic eyes, but its long-term effects on peripheral refraction (PR) and its relationship with myopia progression remains unclear.
Yi Lin Ong   +3 more
doaj   +1 more source

Test and evaluation of the 2.4-micron photorefractor ocular screening system [PDF]

open access: yes
An improved 2.4-m photorefractor ocular screening system was tested and evaluated. The photorefractor system works on the principal of obtaining a colored photograph of both human eyes; and, by analysis of the retinal reflex images, certain ocular ...
Richardson, J. R.
core   +1 more source

VIVID: A qPCR‐Based Platform for Sensitive and Quantitative In Vivo Tracking of Extracellular Vesicles

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces VIVID (Vesicle In Vivo Identification using DNA), a qPCR‐based platform that tracks PCR‐amplifiable DNA tags loaded in the EVs for accurate and quantifiable EV biodistribution in vivo. ABSTRACT Extracellular vesicles (EVs) represent promising carriers for nucleic acid therapeutics, offering advantages over synthetic nanoparticles ...
Oscar Boyadjian   +5 more
wiley   +1 more source

The visual standards for the selection and retention of astronauts [PDF]

open access: yes
Literature search with abstracts on visual performance standards for selection and retention of ...
Allen, M. J.   +4 more
core   +1 more source

Focused and defocused retinal images with Bessel and axicon pupil functions. [PDF]

open access: yes, 2020
Retinal image light distributions in a standard optical model of a diffraction-limited eye with round pupils are presented for several patterns of amplitude and phase modulation of the light admitted into the eye.
Westheimer, Gerald
core  

Deciphering Small Molecule Diffusion Parameters Across Light Responsive Polymersome Membranes

open access: yesAdvanced Functional Materials, EarlyView.
Light‐responsive polymersomes bearing donor–acceptor Stenhouse adducts (DASAs) enable programmable control over small‐molecule transport across synthetic membranes. By systematically varying DASA density, an optimal functionalization regime is identified that maximizes light‐gated permeability.
Farzina Matubbar   +7 more
wiley   +1 more source

Fish eye optics [PDF]

open access: yes, 2017
We report on small student (high school) project of the Czech Academy of Sciences dealing with animal (fish) eyes and possible application in science and technology. Albeit most fishes have refractive eyes, the recent discoveries confirm that some fishes
Hudec R., Michalova S.
core   +1 more source

Sustainable Catalyst‐Free PLG Networks: Recyclability, Biodegradability, and Functional Performance

open access: yesAdvanced Functional Materials, EarlyView.
A catalyst‐additive free covalent adaptable network is developed from star‐shaped poly(lactide‐co‐glycolide) cross‐linked with pyromellitic dianhydride, enabling internal carboxylic acid‐driven transesterification. The resulting biodegradable network exhibits mechanical robustness (Young's modulus ≈1.6 GPa), complete recyclability, rapid biodegradation
Lars Schwarzer   +2 more
wiley   +1 more source

Bioinspired Stabilization of Fluorescent Au@SiO2 Tracers for Multimodal Biological Imaging

open access: yesAdvanced Functional Materials, EarlyView.
This study demonstrates a bioinspired stabilization strategy for fluorescent gold‐silica nanoparticles. Inspired by natural biosilica maturation, high‐temperature calcination transforms the silica shells, preventing dissolution in cell culture media and intracellular environments.
Wang Sik Lee   +5 more
wiley   +1 more source

The Association Between Refraction, Ocular Biometry, and a Child’s Behavior Assessed by Conners’ Parental Rating Scale

open access: yesClinical Ophthalmology
Yuval Cohen,1,2 Michael Eidel,3 Yehuda Greenberger,1 Aviv Vidan,1,2 Otzem Chassid1,2 1Department of Ophthalmology, Ziv Medical Center, Safed, Israel; 2Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel; 3Pediatric Neurology and Child ...
Cohen Y   +4 more
doaj  

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