Results 91 to 100 of about 697,490 (331)

High‐Index, Low‐Loss Optical Material Platforms for Ultra‐Broadband Ultraviolet‐to‐Visible Achromatic Metalenses

Advanced Functional Materials, EarlyView.
An integrated material platform combining engineered SiNx thin films and printable ZrO2 nanoparticle‐embedded resin enables broadband achromatic metalenses from the ultraviolet to visible range. The demonstrated meta‐optics achieve near‐diffraction‐limited focusing with minimal chromatic aberration.
Hyunjung Kang, Dongmin Jeon, Eunji Lee, Junsuk Rho   +3 more
wiley   +1 more source

Age-related changes of the human ciliary muscle. A quantitative morphometric study

, 1992
The age-related changes of the ciliary muscle of human eyes (33-87 years) were studied on histological meridional sections. Eighty-five melanoma eyes and 10 eyes of normal donors were investigated. The total area and the length of the muscle, the area of
Tamm, Svenja, Rohen, J. W., Tamm, Ernst R.   +2 more
core   +1 more source

The effect of acute hyperglycemia on retinal thickness and ocular refraction in healthy subjects

Graefe's Archive for Clinical and Experimental Ophthalmology, 2008
PurposeTo quantify the retinal thickness and the refractive error of the healthy human eye during hyperglycemia by means of optical coherence tomography (OCT) and Hartmann–Shack aberrometry.MethodsHyperglycemia was induced in five healthy subjects who ...
N. Wiemer, E. Eekhoff, S. Simsek, R. Heine, P. Ringens, B. Polak, M. Dubbelman   +6 more
semanticscholar   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

Invisible Polymer Walls Enhance Reorientational Optical Nonlinearity in Oligothiophene‐Doped Liquid Crystals

Advanced Functional Materials, EarlyView.
The polymer wall stabilized dye‐doped liquid crystals (PWLCs) enhance the sensitivity of photoinduced molecular reorientation in dye‐doped LC systems. The PWLC with an invisible polymer wall successfully reduces the threshold intensity and functions as an optical limiter under the incidence of low intensity light laser source.
Junki Yokota, Yuya Nakata, Erika Katayama, Miho Aizawa, Kyohei Hisano, Shoichi Kubo, Atsushi Shishido   +6 more
wiley   +1 more source

Quantitative analysis of retinal vascular parameters changes in school-age children with refractive error using artificial intelligence

Frontiers in Medicine
AimTo quantitatively analyze the relationship between spherical equivalent refraction (SER) and retinal vascular changes in school-age children with refractive error by applying fundus photography combined with artificial intelligence (AI) technology and
Linlin Liu, Lijie Zhong, Linggeng Zeng, Fang Liu, Xinghui Yu, Lianfeng Xie, Shuxiang Tan, Shuang Zhang, Yi-Ping Jiang   +8 more
doaj   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

The effects of visual activities and parental history of myopia on ocular development and refraction in pre-school children. [PDF]

, 1996
by Maksudul Islam.Publication date from spine.Thesis (M.Phil.)--Chinese University of Hong Kong, 1995.Includes bibliographical references (leaves 58-65).Questionaire also in Chinese.Chapter CHAPTER1 --- ABSTRACT --- p.1Chapter CHAPTER2 --- INTRODUCTION -

core  

Ocular alignment and refraction in preterm children at 1 and 6 years old [PDF]

, 2014
Purpose: To investigate cycloplegic refraction and ocular alignment in a population of preterm children at 1 and 6 years old. Patients and methods: We included 261 preterm infants with a birth weight ≤1,500 g and a gestational age ≤32 weeks; there were ...
AZZOLINI, CLAUDIO, Al Oum, M., Cerri, L., DONATI, SIMONE, AGOSTI, MASSIMO, Agosti, M.   +5 more
core   +1 more source

Powering Nanocrystal‐Based Heat Engines With Light‐Emitting Metasurfaces That Influence Their Temperature

Advanced Functional Materials, EarlyView.
Metasurfaces and other structured photonic environments can dramatically modify the absorption and/or light emission of semiconductors. However, the consequences of these changes on the temperature of the system are not well understood. The authors address this problem for colloidal nanocrystals and leverage their findings to convert light into ...
Hugo Kowalczyk, Yihao Yuan, Augustin Caillas, Amel Saidoun, Roméo Bonnet, Pascal Filloux, Emmanuel Lhuillier, Aloyse Degiron   +7 more
wiley   +1 more source