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E S Pirogova, O L Fabrikantov, S I Nikolashin
Intumescent cataract surgery is one of the topical problems of ophthalmology. The article reviews methods of intumescent cataract diagnostics and structural features of swelling lens. Manual or femtolaser-assisted anterior continuous circular capsulorhexis and intumescent cataract phacoemulsification techniques require further research.
2018: Vestnik Oftalmologii
Frank Sachers, David Goldblum
BACKGROUND: Capsulorhexis is one of the most important steps in cataract surgery. Good centration, circular overlap in sufficient size and a circular edge without tears result in good centration of the intraocular lens (IOL). In this study, the capsulorhexis results of an experienced surgeon are compared with reported data in femtolaser assisted cataract surgery (FLACS). PATIENTS AND METHODS: 105 consecutive operations were photographically documented; in 81 cases size and overlap were analysed retrospectively...
April 2018: Klinische Monatsblätter Für Augenheilkunde
N P Pashtaev, N A Pozdeeva, V V Zotov, M V Sinitsyn, M A Shcheglova
AIM: to conduct a comparative experimental study of the effect of the use of intracorneal implants during femtosecond laser-assisted intrastromal pocket (IP) and intrastromal tunnel (IT) formation on the strength properties of the cornea. MATERIAL AND METHODS: The experimental study was performed on 24 corneas of 12 rabbit eyes enucleated 1 month after slaughtering. All eyes were divided into 6 groups according to the method of operation. IP and IT were created with IntraLase FS 60 kHz femtolaser...
2018: Vestnik Oftalmologii
I L Kulikova, O V Shlenskaya, N V Chapurin
AIM: to analyze corneal hysteresis (CH) and corneal resistance factor (RF) readings obtained with the Reichert Ocular Response Analyzer (ORA) before and after hyperopic femtolaser-assisted laser in situ keratomileusis (FS-LASIK) in children with anisometropia as well as to establish factors that may cause changes in these parameters. MATERIAL AND METHODS: CH and RF were evaluated before and 1.5 years after FS-LASIK performed on amblyopic eyes of 28 patients aged 6-14 years...
2017: Vestnik Oftalmologii
Sri Ganesh, Sheetal Brar, Rohit Sreenath
PURPOSE: The purpose of this study is to evaluate the safety and benefits of immediate sequential bilateral cataract surgery. PATIENTS AND METHODS: Retrospective data analysis of patients who underwent immediate sequential bilateral phacoemulsification with foldable intraocular lens (IOL) implantation under topical anesthesia from January 2011 to September 2016 was performed. Patients with visually significant bilateral cataract within the axial length range of 21...
May 2017: Indian Journal of Ophthalmology
Mohamed Samy Abd Elaziz, Adel Galal Zaky, Abdel Rahman El SaebaySarhan
PURPOSE: To study application of stromal lenticules extracted by femtolaser small incision lenticule extraction (SMILE) surgery as a surgical adjuvant to seal corneal perforations. METHODS: Corneal stromal lenticules obtained through SMILE surgery with central thickness 100 μm or more were fixed over corneal perforation sites using 10-0 nylon interrupted stitches with an overlying single layer of amniotic membrane. Seven patients who had been followed up for a minimum of 12 months were assessed using slit-lamp biomicroscopy, fluorescein stain, tonometry, and best spectacle-corrected visual acuity (BSCVA) measurements...
June 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
Tian-Shu Chu, Jinmei Xu
Hydrogen bonding dynamics has received extensive research attention in recent years due to the significant advances in femtolaser spectroscopy experiments and quantum chemistry calculations. Usually, photoexcitation would cause changes in the hydrogen bonding formed through the interaction between hydrogen donor and acceptor molecules on their ground electronic states, and such transient strengthening or weakening of hydrogen bonding could be crucial for the photophysical transformations and the subsequent photochemical reactions that occurred on a time scale from tens of femtosecond to a few nanoseconds...
September 2016: Journal of Molecular Modeling
Jorge L Alió del Barrio, Mohammed Ziaei, Maninder Bhogal, Bruce D Allan
PURPOSE: To review indications and clinical results for a hybrid deep lamellar endothelial keratoplasty (Femto-DLEK) technique combining contemporary donor tissue preparation and implantation techniques with femtosecond laser-assisted dissection of the host tissue. METHODS: A retrospective analysis of consecutive cases of Femto-DLEK performed between 2011 and 2014 at Moorfields Eye Hospital, London, was conducted. All patients underwent manifest refraction and optical coherence tomography examination at their most recent review visit...
November 2015: Cornea
Sri Ganesh, Sheetal Brar
No abstract text is available yet for this article.
2015: International Journal of Ophthalmology
Mukesh Taneja, Varsha M Rathi, Bhupesh Bagga
PURPOSE: To report the use of femtosecond laser platform to remove a glass foreign body (FB) and remove scar by performing sutureless lamellar keratoplasty. CASE REPORT: A 34-year-old man presented with a posttraumatic anterior stromal scar and retained corneal glass FB after injury to his left eye, sustained in a prior vehicular accident. Right eye examination was essentially normal. Best-corrected visual acuity of the left eye was 20/320. He underwent femtosecond laser-assisted sutureless anterior lamellar keratoplasty using the 500-kHz femtosecond laser machine...
February 2015: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Zoltan Z Nagy
Femtosecond lasers represent a new frontier in cataract surgery. Since their introduction and first human treatment in 2008, a lot of new developments have been achieved. In this review article, the physical principle of femtolasers is discussed, together with the indications and side effects of the method in cataract surgery. The most important clinical results are also presented regarding capsulotomy, fragmentation of the crystalline lens, corneal wound creation, and refractive results. Safety issues such as endothelial and macular changes are also discussed...
2014: Clinical Ophthalmology
Darwin R Reyes, Albert Folch, Harp Minhas, Michael Gaitan
The 6th annual μTAS Art in Science Award was presented to Ye Wang of Eindhoven University of Technology at the 17th International Conference of Miniaturized Systems for Chemistry and Life Sciences held in Freiburg, Germany, on October 27-31, 2013. The winning image captivated the hearts and minds of the judges and is featured on the front cover of this issue. "Artificial Life", as the author of the work that produced this image named it, was taken with a scanning electron microscope (SEM) and shows cilia-like structures (or "microhairs") generated from PDMS (polydimethylsiloxane) and magnetic nanoparticles (Y...
April 21, 2014: Lab on a Chip
J Kacerovská, M Kacerovský, R Kadlec
PURPOSE: Compare the effect of cataract surgery with conventional phacoemulsification and cataract surgery performed on the cornea assisted by femtolaser with the help of contactless endothelial microscope. THE GROUP OF PATIENTS AND METHODS: In each group there were 25 eyes (25 patients) after the cataract surgery with conventional phacoemulsification and 25 eyes (25 patients) after cataract surgery performed on the cornea assisted by femtolaser with the help of contactless endothelial microscope...
October 2013: Ceská a Slovenská Oftalmologie
Gregor Wollensak, Christian M Hammer, Eberhard Spörl, Jörg Klenke, Katrin Skerl, Yao Zhang, Saadettin Sel
PURPOSE: The aim of this study was to assess the biomechanical efficacy of transepithelial collagen crosslinking using the femtosecond laser pocket technique compared with that using the standard crosslinking (CXL) technique. METHODS: Forty ex vivo porcine eyes were divided into 4 groups with 10 samples each. Group 1 comprised the untreated controls. Group 2 was the standard CXL group with debridement, instillation of 0.1% riboflavin-dextran solution for 15 minutes before and every 5 minutes during the 30 minutes of irradiation with ultraviolet A (UVA) light of 370 nm and an irradiance of 3 mW/cm²...
March 2014: Cornea
Hana Abouzeid
Introduced in 2008, femtolaser is playing a more and more significant role in cataract surgery. This laser allows to perform three steps of the cataract surgery: the corneal incisions, the capsulotomy, and the lens fragmentation. The prooved advantages of the technique are a better quality of the incisions with a reduced induced astigmatism, a better reliability and reproducibility of the capsulotomy with a better stability of the implanted lens and a reduction of the use of ultrasounds which can negatively affect the cornea...
December 11, 2013: Revue Médicale Suisse
Zoltán Z Nagy, Jacek P Szaflik
Having been very successful in corneal surgery, femtolasers were recently introduced into the surgery of crystalline lens. The most important indications and advantages include: perfectly centered and sized capsulotomy, liquefaction of softer lenses and fragmentation of harder lenses which allows for chopping the nucleus without the use of phaco energy. Femtolaser can also be used for creating corneal wounds (tunnels) of any size at any location, and in order to manage the preoperative astigmatism using arcuate incisions at the desired depth within the cornea...
2012: Klinika Oczna
Zoltan Z Nagy
No abstract text is available yet for this article.
December 2012: Journal of Refractive Surgery
Agnes I Takács, Illés Kovács, Kata Miháltz, Tamás Filkorn, Michael C Knorz, Zoltán Z Nagy
PURPOSE: To compare the effect of conventional phacoemulsification and femtosecond laser-assisted cataract surgery on the cornea using Scheimpflug imaging and noncontact specular microscopy. METHODS: In each group, 38 eyes (38 patients) underwent cataract surgery using either femtosecond laser-assisted (Alcon LenSx laser) (femtolaser group) or conventional phacoemulsification (phaco group). Central corneal thickness, 3-mm corneal volume, and Pentacam Nucleus Staging (PNS) were determined by a rotating Scheimpflug camera (Pentacam HR, Oculus Optikgeräte GmbH), and the volume stress index was calculated at 1 day and 1 month postoperatively...
June 2012: Journal of Refractive Surgery
Detlef Uthoff, Markus Pölzl, Daniel Hepper, Detlef Holland
PURPOSE: To investigate the outcomes of simultaneous correction of presbyopia and ametropia by a bi-aspheric cornea modulation technique, based on the creation of a central area hyperpositive for near vision and leaving the pericentral cornea for far vision in hyperopic, emmetropic, and myopic presbyopic patients. SETTING: Sixty eyes of 30 patients were treated with the PresbyMAX technique by one surgeon (D.U.) at the Eye Hospital Bellevue, Kiel, Germany. METHODS: Twenty eyes with hyperopic presbyopia, 20 eyes with emmetropic presbyopia, and 20 eyes with myopic presbyopia underwent Femto-Lasik, and were assessed up to 6 months postoperatively...
November 2012: Graefe's Archive for Clinical and Experimental Ophthalmology
Hailong Qiu, Liang Sun, Shuo Tan, Yu Sun, Shuwei Hao, Yong Yu, Weiqiang Lv, Shibin Ge, Chunhui Yang
Cubic nanocrystal and hexagonal micro-rods NaYF4, with predictable size, shape and phase, have been successfully synthesized through hydrothermal reaction. The growth mechanism and the effect of mass transfer on the morphology of hexagonal micro-prism are both discussed in detail. The increase of tri-doping lanthanide ion concentration decreased the size of crystal particle, which was explained by the Arrhenius rate equation together combined with the Gibbs-Thomson relationship. Furthermore, the dopants did not only affect the sizes of tri-doped NaYF4 micro-rods, but also impacted upon fluorescence intensity...
September 2011: Journal of Nanoscience and Nanotechnology
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