Results 91 to 100 of about 202,416 (340)

Visual Profile of Children who Passed or Failed the UK School Vision Screening Protocol

British and Irish Orthoptic Journal, 2019
Background: We applied the National Screening Committee vision screening protocol [pass criterion monocular acuity ≤ 0.2 LogMAR in both eyes(BE)] to children four to five years old to investigate the visual profile of children who passed/failed. Previous
Sara McCullough, Kathryn Saunders
doaj   +1 more source

Non-perturbative approach to high-index-contrast variations in electromagnetic systems

, 2005
We present a method that formally calculates \emph{exact} frequency shifts of an electromagnetic field for arbitrary changes in the refractive index. The possible refractive index changes include both anisotropic changes and boundary shifts.
Ballentine, Barnes, Greffet, Jensen, Joannopoulos, Johnson, Johnson, Knight, Knight, Lars Rindorf, Marcuse, Martin, Mortensen, Niels Asger Mortensen, Nielsen, Pendry, Sakoda, Skorobogatiy, Skorobogatiy, Skorobogatiy, Steel   +20 more
core   +1 more source

Uncorrected refractive error [PDF]

British Journal of Ophthalmology, 2006
We need to act now to eliminate preventable blindness by the year 2020 In 1997, the World Health Organization set itself an ambitious goal to eliminate avoidable blindness in the world by 2020, with one of the five main priorities being refractive errors.1,2 A recent review of the impact of Vision 2020 on preventable blindness, other than uncorrected ...
openaire   +1 more source

Nanomaterial‐Integrated Fiber Neural Probes for Deep Brain Monitoring and Modulation: Challenges and Opportunities

Advanced Functional Materials, EarlyView.
The article presents nanomaterial‐integrated fiber neural probes as innovative tools for deep brain molecular sensing, neural stimulation, and temperature monitoring. It examines breakthroughs in SERS‐based biomolecule detection, thermoplasmonic activation, and luminescent thermometry, alongside strategies to overcome stability, specificity, and ...
Di Zheng, Yang Li, Muhammad Fayyaz Kashif, Linda Piscopo, Massimo De Vittorio, Ferruccio Pisanello   +5 more
wiley   +1 more source

Refractive errors in 3-6 year-old Chinese children: a very low prevalence of myopia?

, 2015
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
Lan, Weizhong, Li, Zhen, Lin, Lixia, Morgan, Ian G., Yang, Zhikuan, Zeng, Junwen, Zhao, Feng   +6 more
core   +1 more source

Microsphere Autolithography—A Scalable Approach for Arbitrary Patterning of Dielectric Spheres

Advanced Functional Materials, EarlyView.
MicroSphere Autolithography (µSAL) enables scalable fabrication of patchy particles with customizable surface motifs. Focusing light through dielectric microspheres creates well defined, tunable patches via a conformal poly(dopamine) photoresist. Nearly arbitrary surface patterns can be achieved, with the resolution set by the index contrast between ...
Elliott D. Kunkel, Alec G. Burnett, Katherine E. Scheiber, Hans D. Robinson   +3 more
wiley   +1 more source

Proposed framework for the integration of refractive error services into the eye health ecosystem in Kenya via social enterprise

Scientific Reports
The global burden of uncorrected refractive error demands for adoption of different approaches inclined towards scaling effective refractive error coverage.
Shadrack Muma, Kovin Shunmugam Naidoo, Rekha Hansraj   +2 more
doaj   +1 more source

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

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

Prevalence of Refractive Errors among Primary School Children in the Southern Region of Bangladesh

, 2022
Syeed Mehbub Ul Kadir, Mahar Ali, Md Shirajul Islam, Rukhsana Parvin, ASM Quadir, Mostafa Jahir Raihani, AKM Rafiqul Islam, Saifuddin Ahmmed   +7 more
openalex   +2 more sources

A Smart Magnetically Actuated Flip‐Disc Programmable Metasurface with Ultralow Power Consumption for Real‐Time Channel Control

Advanced Functional Materials, EarlyView.
The study proposes a 1‐bit programmable metasurface based on flip‐disc display, named flip‐disc metasurface (FD‐MTS). This new design enables ultralow energy consumption while maintaining coding patterns. It also exhibits high scalability and multifunctional flexibility.
Jiang Han Bao, Che Liu, Jia Cheng Li, Zhen Hao Fu, Yi Su Huang, Si Qi Huang, Lei Zhang, Jian Wei You, Tie Jun Cui   +8 more
wiley   +1 more source