Results 201 to 210 of about 639,028 (243)

Trends in myopia prevalence among children and adolescents: a large-scale cross-sectional study in Shihezi, China. [PDF]

BMC Public Health
Hu X, Yuan X, Li H, Gong H, Fu Z, Xie Y, Wang L, Rui D.   +7 more
europepmc   +1 more source

Visual and refractive outcome, higher order aberrations and complications following intraocular lens exchange in eyes without comorbidities. [PDF]

Sci Rep
Henningsen N, Khoramnia R, Auffarth GU, Köppe MK, Łabuz G, Yildirim TM.   +5 more
europepmc   +1 more source

Myopia Control Efficacy of Spectacle Lenses with Dual-Index Aspherical Lenslets: A 1-Year Randomized Clinical Trial. [PDF]

Ophthalmol Sci
Wong YL, Tan A, Lim EW, Chua HR, Shen L, Guillot M, Drobe B.   +6 more
europepmc   +1 more source

Pediatric IOL power calculation: Factors and considerations. [PDF]

Indian J Ophthalmol
Rathod A, Khokhar S, Rani D.
europepmc   +1 more source

Effectiveness of bright light therapy and combination with myopic defocus for controlling myopic eye growth in schoolchildren: study protocol for a randomised controlled trial (phase 1). [PDF]

BMJ Open Ophthalmol
Hon Y, Chun RKM, Cheung BKK, Lam DMK, Kong ACW, Ho LM, Lam WC, Lam TC, Lam CS, Lian J, Morgan IG, To CH, Leung CKS, Tse DY.   +13 more
europepmc   +1 more source

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Topological negative refraction of surface acoustic waves in a Weyl phononic crystal

Nature, 2018
Reflection and refraction of waves occur at the interface between two different media. These two fundamental interfacial wave phenomena form the basis of fabricating various wave components, such as optical lenses. Classical refraction—now referred to as
Hailong He, Chunyin Qiu, Liping Ye, Xiangxi Cai, Xiying Fan, M. Ke, Fan Zhang, Zhengyou Liu   +7 more
semanticscholar   +3 more sources

Relative peripheral refraction in children: twelve‐month changes in eyes with different ametropias

Ophthalmic and Physiological Optics, 2013
T. Lee, P. Cho
semanticscholar   +3 more sources

Ultra-High-Efficiency Anomalous Refraction with Dielectric Metasurfaces

, 2018
Anomalous refraction is a form of extreme waveform manipulation that can be realized with artificially structured nanomaterials, such as metamaterials or metasurfaces.
David Sell, Jianji Yang, Evan W. Wang, T. Phan, Sage Doshay, Jonathan A. Fan   +5 more
semanticscholar   +1 more source

Broadband ultrafast nonlinear absorption and nonlinear refraction of layered molybdenum dichalcogenide semiconductors.

Nanoscale, 2014
A series of layered molybdenum dichalcogenides, i.e., MoX₂ (X = S, Se and Te), were prepared in cyclohexyl pyrrolidinone by a liquid-phase exfoliation technique. The high quality of the two-dimensional nanostructures was verified by transmission electron
Kangpeng Wang, Yanyan Feng, Chunxia Chang, J. Zhan, Chengwei Wang, Quanzhong Zhao, J. Coleman, Long Zhang, W. Blau, Jun Wang   +9 more
semanticscholar   +1 more source

Negative refraction and planar focusing based on parity-time symmetric metasurfaces.

Physical Review Letters, 2014
We introduce a new mechanism to realize negative refraction and planar focusing using a pair of parity-time symmetric metasurfaces. In contrast to existing solutions that achieve these effects with negative-index metamaterials or phase conjugating ...
R. Fleury, D. Sounas, A. Alú
semanticscholar   +1 more source