Results 91 to 100 of about 5,696 (229)

Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism

Clinical Ophthalmology, 2015
Steven C Schallhorn,1,2 Jan A Venter,2 Stephen J Hannan,2 Keith A Hettinger2 1University of California, San Francisco, CA, USA; 2Optical Express, Glasgow, UK Purpose: The purpose of this study was to evaluate the refractive and visual outcomes of ...
Schallhorn SC, Venter JA, Hannan SJ, Hettinger KA   +3 more
doaj  

A new low-cost, compact, auto-phoropter for refractive assessment in developing countries

Scientific Reports, 2017
Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system
Babak Amirsolaimani, Gholam Peyman, Jim Schwiegerling, Arkady Bablumyan, N. Peyghambarian   +4 more
doaj   +1 more source

In silico predictions of action potential propagation in doxorubicin cardiotoxicity: A parametric study using preclinical 3D magnetic resonance imaging‐based fibrotic left ventricle models

The Journal of Physiology, EarlyView.
Abstract figure legend Schematic overview of the study's methodology and key findings. In a preclinical swine model, doxorubicin administration induced cardiotoxicity, characterized by diffuse fibrotic remodelling and altered electrical function, as assessed by magnetic resonance (MR) imaging and electrophysiological mapping.
Javier Villar‐Valero, Jairo Rodríguez Padilla, Nicolas Cedilnik, Buntheng Ly, Juan F. Gomez, Maxime Sermesant, Mihaela Pop, Beatriz Trenor   +7 more
wiley   +1 more source

Research Progress of Deformable Mirror and Its Control Algorithm

Guangtongxin yanjiu
【Objective】Deformable Mirror(DM) is a key device in adaptive optics system for wavefront correction, and its performance directly determines the wavefront correction capability of the system.
LIANG Jingyuan, WANG Hairong, ZHANG Na, ZHANG Xiaodan, ZHAO Li, WANG Huiqing, WANG Yi, KE Xizheng   +7 more
doaj  

Deep learning enabled robust wavefront sensing for active beam smoothing with a continuous phase modulator

High Power Laser Science and Engineering
In laser systems requiring a flat-top distribution of beam intensity, beam smoothing is a critical technology for enhancing laser energy deposition onto the focal spot.
Yamin Zheng, Yifan Zhang, Liquan Guo, Pei Li, Zichao Wang, Yongchen Zhuang, Shibing Lin, Qiao Xue, Deen Wang, Lei Huang   +9 more
doaj   +1 more source

Electrodiffusion in cardiac intercalated disc nanostructures alters cell–cell action potential transmission via ephaptic coupling: A model study

The Journal of Physiology, EarlyView.
Abstract figure legend Ephaptic phenomena in a high‐resolution model of the cardiac intercalated disc. Meshed representation of a tortuous intercalated disc that was generated based on electron and super‐resolution microscopy data. Na+ channels (red) and gap junctions (green) are heterogeneously distributed, with additional regions of reduced ion ...
Ena Ivanovic, Marina Vannucci, Nicolae Moise, Seth H. Weinberg, Jan P. Kucera   +4 more
wiley   +1 more source

Experimental Study on Wavefront Distortion Correction in Atmospheric Turbulence Using Zernike-Wavelet Hybrid Basis

Applied Sciences
In adaptive optics systems, most methods rely on reconstruction techniques centered on regional or global orthogonal bases, which struggle to accommodate the multi-scale characteristics of atmospheric turbulence wavefronts.
Jingyuan Liang, Yilin Hao, Hui Li, Xizheng Ke   +3 more
doaj   +1 more source

Hard X-ray wavefront correction via refractive phase plates made by additive and subtractive fabrication techniques. [PDF]

J Synchrotron Radiat, 2020
Seiboth F, Brückner D, Kahnt M, Lyubomirskiy M, Wittwer F, Dzhigaev D, Ullsperger T, Nolte S, Koch F, David C, Garrevoet J, Falkenberg G, Schroer CG.   +12 more
europepmc   +1 more source

Translating cardiovascular ion channel and Ca2+ signalling mechanisms into therapeutic insights

The Journal of Physiology, EarlyView.
Abstract figure legend This white paper integrates mechanistic discoveries across ion channel biology, Ca2+ signalling and multiscale cardiovascular physiology to highlight new opportunities for accelerating research and guiding next‐generation therapies. Printed with permission from ®Anita Impagliazzo Medical Illustration. [Correction added on 2 March
Silvia Marchianò, Miguel Martín‐Aragón Baudel, Charlotte E. R. Smith, Gonzalo Hernandez Hernandez, Donald M. Bers, Patrick M. Boyle, Dobromir Dobrev, Shanna Hamilton, Osama F. Harraz, Na Li, Thomas A. Longden, William E. Louch, Madeline Nieves‐Cintron, Matthew A. Nystoriak, Walter Lee Murfee, Przemysław B. Radwański, Swapnil K. Sonkusare, Manuel F. Navedo, Eleonora Grandi   +18 more
wiley   +1 more source

Panoramic voltage‐sensitive optical mapping of contracting hearts using cooperative multiview motion tracking with 12 cameras

The Journal of Physiology, EarlyView.
Abstact figure legend A panoramic 3D optical mapping system was developed, enabling imaging of action potential waves across the entire strongly deforming ventricular surface of beating isolated hearts. The system comprises 12 high‐speed cameras and a soccerball‐shaped imaging chamber with 48 light‐emitting diodes (LEDs).
Shrey Chowdhary, Jan Lebert, Shai Dickman, Mason Manetta, Charles Gordon, Jan Christoph   +5 more
wiley   +1 more source