نتایج جستجو برای: femtosecond laser

تعداد نتایج: 188297  

Journal: :Journal of biomedical optics 2014
Erica Su Hui Sun Tibor Juhasz Brian J F Wong

Microfracture surgery is a bone marrow stimulation technique for treating cartilage defects and injuriesin the knee. Current methods rely on surgical skill and instrumentation. This study investigates the potential useof laser technology as an alternate means to create the microfracture holes. Lasers investigated in this study include an erbium:YAG laser (λ = 2.94 μm), titanium:sapphire femtose...

Journal: :Journal of cataract and refractive surgery 2016
Ryan M St Clair Anushree Sharma David Huang Fei Yu Yakov Goldich David Rootman Sonia Yoo Florence Cabot Jason Jun Lijun Zhang Anthony J Aldave

PURPOSE To develop a nomogram for femtosecond laser astigmatic keratotomy (AK) to treat post-keratoplasty astigmatism. SETTING Three academic medical centers. DESIGN Retrospective interventional case series. METHODS A review of post-keratoplasty femtosecond laser AK was performed. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, manifest refraction, and keratometry were r...

2009
Matthias WOLLENHAUPT Lars ENGLERT Alexander HORN Thomas BAUMERT

An overview on femtosecond laser pulse shaping techniques applied to control of the initial photo-physical steps involved in materials processing is presented. First, pulse shaping methodology in frequency domain is introduced and examples of shaped pulses relevant to laser microfabrication are discussed. Then, the use of tailored femtosecond pulses to control the initial steps of laser process...

2017
Verónica García-Sanz Vanessa Paredes-Gallardo Carlos Bellot-Arcís Omel Mendoza-Yero Carlos Doñate-Buendía Javier Montero Alberto Albaladejo

Femtosecond laser has been proposed as a method for conditioning zirconia surfaces to boost bond strength. However, metallic or ceramic bracket bonding to femtosecond laser-treated zirconia surfaces has not been tested. This study compared the effects of four conditioning techniques, including femtosecond laser irradiation, on shear bond strength (SBS) of metallic and ceramic brackets to zircon...

2016
Dong ZHONG Zhong Ming LI Chun CHEN Ruo Lin RUAN

We experimentally investigate the acoustic characteristic of micro plasma shock wave obtained by femtosecond laser ablation of silicon wafer surface using F-P optical fiber acoustic sensor with anti electromagnetic interference. The experimental results show that each of the femtosecond laser pulse can only produce a plasma shock wave. Under the different femtosecond laser energy, the acoustic ...

2016
Timothy V Roberts Michael Lawless Gerard Sutton Chris Hodge

The introduction of femtosecond lasers to cataract surgery has been the major disruptive technology introduced into ophthalmic surgery in the last decade. Femtosecond laser cataract surgery (FLACS) integrates high-resolution anterior segment imaging with a femtosecond laser allowing key steps of cataract surgery to be performed with computer-guided laser accuracy, precision, and reproducibility...

Journal: :Biomedical optics express 2018
Qiqi Sun Zhongya Qin Wanjie Wu Yue Lin Congping Chen Sicong He Xuesong Li Zhenguo Wu Yi Luo Jianan Y Qu

Femtosecond laser microsurgery has become an advanced method for clinical procedures and biological research. The tissue treated by femtosecond laser can become highly fluorescent, indicating the formation of new fluorescent compounds that can naturally label the treated tissue site. We systematically characterized the fluorescence signals produced by femtosecond laser ablation in biological ti...

2004
Xianzhong Zeng Xianglei Mao Ralph Greif Richard E. Russo

Femtosecond laser ablation of silicon in air was studied and compared with nanosecond laser ablation at ultraviolet wavelength (266 nm). Laser ablation efficiency was studied by measuring crater depth as a function of pulse number. For the same number of laser pulses, the fs-ablated crater was about two times deeper than the ns-crater. The temperature and electron number density of the pulsed l...

2018
Yu Zhang Yue-Guo Chen

BACKGROUND To compare the incidence of rainbow glare (RG) after femtosecond laser assisted-LASIK (FS-LASIK) using the upgraded FS200 femtosecond laser with different flap cut parameter settings. METHODS A consecutive series of 129 patients (255 eyes) who underwent FS-LASIK for correcting myopia and/or astigmatism using upgraded WaveLight FS200 femtosecond laser with the original settings was ...

Journal: :Journal of refractive surgery 2015
Gregory D Parkhurst Enrique Barragan Garza Arthur A Medina

PURPOSE To describe two cases of successful femtosecond laser-assisted cataract surgery in patients with a transparent hydrogel corneal inlay (Raindrop Near Vision Inlay; ReVision Optics, Inc., Lake Forest, CA). METHODS Case report. RESULTS In both cases, femtosecond laser-assisted cataract surgery was performed with the inlay in place. The femtosecond laser pulses were delivered without di...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید