Results 51 to 60 of about 30,062 (169)

The use of WaveLight® Contoura to create a uniform cornea: the LYRA Protocol. Part 2: the consequences of treating astigmatism on an incorrect axis via excimer laser

Clinical Ophthalmology, 2017
Manoj Motwani Motwani LASIK Institute, San Diego, CA, USA Purpose: To show how an incorrect manifest astigmatism axis can cause an abnormal induced astigmatism on a new axis. Patients and methods: Four eyes of three patients were treated primarily with
Motwani M
doaj  

Laser‐Based In Situ Diagnostics of Temperature and Material‐Growth Dynamics in Photothermal Laser Nanoprinting of ZnO

Laser &Photonics Reviews, EarlyView.
This work elucidates the previously unknown thermal dynamics during sub‐micrometer photothermal laser printing of zinc oxide using a non‐invasive transmission‐based in situ measurement. The elevated temperatures are shown to be highly localized around the laser focal spot, reaching average temperature increases of about 113 K per mW of laser power ...
Steven Kraus, Kristian Kraft, Yolita M. Eggeler, Martin Wegener, Paul Somers   +4 more
wiley   +1 more source

Controlling the Center of Mass Motion of Levitated Particles Using Structured Wavefronts

Laser &Photonics Reviews, EarlyView.
Optically levitated particles have great potential for quantum‐enhanced sensing. Precise control of the trapping beam is crucial to improve the stability and confinement of these systems. Here, we study how structured wavefronts can be used to control the center‐of‐mass motion of levitated particles, enhancing trap stiffness and enabling stable ...
Shah Jee Rahman, Quimey Pears Stefano, Angel Cifuentes, Jason Francis, Iker Gómez‐Viloria, Ruben Pellicer‐Guridi, Miguel Varga, Gabriel Molina‐Terriza   +7 more
wiley   +1 more source

Diffraction‐Free Natural Optical Skyrmions and Their Subwavelength Confinement Around Vortices

Laser &Photonics Reviews, EarlyView.
ABSTRACT Diffraction causes waves to spread out as they propagate freely. The tighter the lateral confinement, the faster the spreading. Past research on how to suppress diffraction has been based on wave engineering and has led so far to idealized waves that, in real settings, eventually diffract.
Nilo Mata‐Cervera, Deepak K. Sharma, Ramon Paniagua‐Dominguez, Yijie Shen, Miguel A. Porras   +4 more
wiley   +1 more source

Evaluation of Opposite Clear Corneal Incision in Controlling Astigmatism in Cataract Patients Undergoing Phacoemulsification Surgery

Delhi Journal of Ophthalmology, 2016
Aim: To evaluate the role of clear corneal incision combined with opposite clear corneal incision in controlling astigmatism in patients undergoing phacoemulsification surgery for cataract. Design: Prospective clinical study.
J. S. Bhalla, Meenakshi Rani, Surbhi Gupta   +2 more
doaj   +1 more source

An Exploration of the Relationships Between Science Identity and Disabled Identities in Undergraduate Science Students

Science Education, EarlyView.
ABSTRACT Science identity is often conceptualized through constructs such as performance, competence, recognition, and interest, with prior research highlighting the roles of race, gender, and cultural background in shaping students' experiences. However, limited scholarship has examined how disability interacts with science identity in postsecondary ...
Ariel Chasen, Maura Borrego
wiley   +1 more source

Supersampled Scanning Transmission X‐Ray Microscopy for High‐Resolution Vibration‐Independent Time‐Resolved Imaging

Small, EarlyView.
ABSTRACT Scanning transmission x‐ray microscopy (STXM) is a nanoscale imaging technique that can utilize several powerful contrast mechanisms for the quantitative mapping of chemical and physical materials properties. Spatial resolutions down to 7 nm at the soft x‐ray energy range have been demonstrated.
Simone Finizio, Benjamin Watts, Benedikt Rösner, Tim A. Butcher, Sebastian Wintz, Markus Weigand, Jörg Raabe   +6 more
wiley   +1 more source

Nonthermal plasma approaches for combating implant‐associated infections: A compendious review

VIEW, EarlyView.
Implant‐associated infections pose serious clinical challenges. Non‐thermal plasma (NTP) modifications overcome this bottleneck in distinct ways relative to traditional sterilization methods. Gas‐phase plasmas generate highly energetic species, UV radiation and reactive oxygen/nitrogen species (RONS), which alter the implant surface properties.
A. M. Trimukhe, Satish Rojekar, Amol Gholap, K. Navaneetha Pandiyaraj, Mukesh Patekar, Claudia Riccardi, R. R. Deshmukh, Tomáš Kovářík, Kalim Deshmukh   +8 more
wiley   +1 more source

Comparison of the accuracy of toric IOL power in cataract eyes with irregular astigmatism using two keratometry devices

BMC Ophthalmology
Background To compare the accuracy of toric intraocular lens (IOL) calculation using simulated keratometry (SimK) obtained from two different devices in cataract eyes with central or paracentral preoperative corneal irregular astigmatism.
Yinuo Huang, Min Hou, Yujie Ding, Liangping Liu, Ao Sun, Si Li, Mingxing Wu   +6 more
doaj   +1 more source

Focusing, collimation, and beam expansion of high‐energy X‐rays with diamond refractive lenses

Journal of Synchrotron Radiation, EarlyView.
The effectiveness and versatility of diamond refractive optics for high‐energy X‐rays (> 40 keV) is presented in applications to focusing, collimation, and beam expansion, along with design and implementation details.Diamond is extremely well suited for synchrotron X‐ray refractive optics.
Sarvjit D. Shastri, Sergey Antipov
wiley   +1 more source