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schwind cornea refractive surgery

Soheil Adib-Moghaddam, Samuel Arba-Mosquera, Bahram Salmanian, Amir-Houshang Omidvari, Farsad Noorizadeh
PURPOSE: There are many independent factors that influence the outcome of refractive surgeries, consisting of patient characteristics and environmental factors. We studied the accuracy of central ablation depth compared to online pachymetry results. METHODS: A total of 153 eyes that underwent TransPRK at Bina Eye Hospital, Tehran, Iran, were evaluated from November 2010 to January 2012 in a retrospective cross-sectional study. The relevant data were registered and bivariate correlations and linear regression association were investigated statistically...
July 2014: European Journal of Ophthalmology
Abrahão Rocha Lucena, Jório Almino de Alencar Arrais Mota, Descartes Rolim de Lucena, Sabine de Lucena Martins Ferreira, Newton Leitão de Andrade
PURPOSE: The aim of this study was to verify the presence of cyclotorsion in eyes that underwent laser refractive surgery. METHODS: This was a comparative observational study, which analyzed the medical records of 61 patients (104 eyes) who underwent laser refractive surgery and compared the axis of astigmatism of the sitting and the supine positions. Regarding the gender, 37.5% were male and 62.5% were female. The age ranged from 20 to 54 years old, with the median of 29 years...
November 2013: Arquivos Brasileiros de Oftalmologia
Diego de Ortueta, Dennis von Rüden, Thomas Magnago, Samuel Arba Mosquera
PURPOSE: To evaluate the influence of the stromal refractive index and hydration on postoperative outcomes in eyes that had corneal laser refractive surgery using the Amaris laser system. SETTING: Augenzentrum Recklinghausen, Recklinghausen, Germany. DESIGN: Comparative case series. METHODS: At the 6-month follow-up, right eyes were retrospectively analyzed. The effect of the stromal refractive index and hydration on refractive outcomes was assessed using univariate linear and multilinear correlations...
June 2014: Journal of Cataract and Refractive Surgery
Michiel H A Luger, Tobias Ewering, Samuel Arba-Mosquera
PURPOSE: To evaluate the influence of patient age on the postoperative outcomes in eyes with myopia higher than 5.00 diopters (D) that had laser in situ keratomileusis using the Schwind Amaris laser system. SETTING: Private practice, Utrecht, The Netherlands. DESIGN: Case series. METHODS: At the 1-year follow-up, right eyes with preoperative myopia higher than 5.00 D were analyzed. The effect of the patient's age on postoperative status was assessed using univariate linear and multilinear correlations...
February 2013: Journal of Cataract and Refractive Surgery
Pierre Baudu, Franck Penin, Samuel Arba Mosquera
PURPOSE: To analyze the uncorrected binocular performance after biaspheric multifocal central presbyopic laser in situ keratomileusis treatments. DESIGN: Retrospective, interventional case series. METHODS: setting. Private clinical practice. patient or study population. Three hundred fifty-eight presbyopic patients (43% males, 82 myopic), bilaterally treated, suitable for laser in situ keratomileusis, with monocular corrected distance visual acuity of 20/32 or better...
April 2013: American Journal of Ophthalmology
Diego de Ortueta, Thomas Magnago, Nico Triefenbach, Samuel Arba Mosquera, Udo Sauer, Ulrich Brunsmann
PURPOSE: To evaluate the thermal load of ablation in high-speed laser corneal refractive surgery with the AMARIS excimer laser (SCHWIND eye-tech-solutions). METHODS: Thermal load from refractive corrections on human corneas using a 500-Hz laser system with a fluence of 500 mJ/cm(2) and aspheric ablation profiles was recorded with an infrared thermography camera. Each single in vivo measurement was analyzed and temperature values were evaluated. RESULTS: Overall, the maximum temperature change of the ocular surface induced by the refractive ablations was ≤4°C...
January 2012: Journal of Refractive Surgery
Samuel Arba Mosquera, Diego de Ortueta
PURPOSE: To report a case in which a tissue saving program in an aberrated eye was used. METHODS: A new algorithm for the selection of an optimized set of Zernike terms in customized treatments for laser corneal refractive surgery was developed and clinically tested. Ablation was performed using the SCHWIND ESIRIS excimer laser. Pre- and postoperative corneal wave aberrations were analyzed using the Keratron Scout videokeratoscope (Optikon 2000). RESULTS: Required ablation was reduced by approximately 15% compared to full customized correction...
February 2011: Journal of Refractive Surgery
Maria Clara Arbelaez, Tobias Ewering, Samuel Arba Mosquera
PURPOSE: To assess a decision tree analysis system to further optimize refractive surgery outcomes. METHODS: A 5-step decision tree, the Decision Assistant Wizard, based on previous experience with the SCHWIND AMARIS laser, was applied for selecting a customized refractive surgery treatment mode (aspheric aberration neutral, corneal wavefront-guided, or ocular wavefront-guided) to eliminate or reduce total aberration. RESULTS: Using the Decision Assistant Wizard, 6467 LASIK treatments were performed over a 30-month period; 5262 and 112 for myopic and hyperopic astigmatism, respectively, using aspheric aberration neutral (AF) profiles, 560 using corneal wavefront-guided profiles, and 533 using ocular wavefront-guided profiles...
December 2010: Journal of Refractive Surgery
Maria Clara Arbelaez, Camila Vidal, Samuel Arba Mosquera
PURPOSE: To compare measurements of ultrasound, Scheimpflug, and optical coherence pachymetric techniques to describe ablated depth after myopic astigmatic corneal laser refractive surgery and achieved refractive correction. METHODS: Ninety-six myopic astigmatism treatments using LASIK or LASEK in 58 patients with 3-month followup were retrospectively analyzed. In all cases, standard examinations, pre-/postoperative corneal topography, ocular aberrometry, and pachymetry were performed...
August 2009: Journal of Refractive Surgery
D De Ortueta, C Haecker
PURPOSE: To evaluate the results of treatment of mixed astigmatism with laser in situ keratomileusis (LASIK) by means of a modified Chayet formula for bitoric ablation and personalized nomogram calculations. METHODS: A retrospective study was conducted in 19 consecutive eyes of 13 patients who underwent LASIK treatment of mixed astigmatism with a mean sphere of +1.63-/+1.23 D and a mean cylinder of -3.55-/+1.17 D. The authors used the Schwind ESIRIS Laser platform...
November 2008: European Journal of Ophthalmology
Dolores Ortiz, Jorge L Alió, David Piñero
PURPOSE: To compare the change in corneal curvature from the predicted surgical radius (sculpted in the corneal stroma) and the measured postoperative radius of the first surface of the cornea after laser in situ keratomileusis (LASIK) for myopia correction using 2 methods of flap creation: mechanical microkeratome and femtosecond laser. SETTING: Vissum-Instituto Oftalmológico de Alicante, Alicante, Spain. METHODS: This retrospective consecutive nonrandomized comparative interventional case series included 85 eyes with myopia or myopic astigmatism treated using the Esiris excimer laser (Schwind)...
February 2008: Journal of Cataract and Refractive Surgery
Jorge Alió, Ahmed Galal, Raúl Montalbán, David Piñero
PURPOSE: To investigate the safety and efficacy of customized corneal wavefront-guided retreatment in symptomatic patients with highly aberrated corneas following LASIK. METHODS: This prospective study included 75 eyes of 59 patients with significant visual symptoms who underwent LASIK for the correction of residual refractive error. Ablation profiles were calculated using CSO corneal topography and ESIRIS/Schwind laser platform. Eyes were divided into two groups: those with significant night vision symptoms (37 eyes; night symptoms group) and those with decentration, irregular ablation profile, and flap complications (38 eyes; corneal complications group)...
October 2007: Journal of Refractive Surgery
Jorge L Alió, David Piñero, Orkun Muftuoglu
PURPOSE: To evaluate the results of corneal wavefront (WF)-guided enhancements in patients with night vision symptoms and significantly high positive spherical aberration (SA) after myopic laser refractive surgery. DESIGN: Noncomparative, interventional case series. METHODS: Twenty-eight eyes of 20 patients with significant night vision symptoms and positive corneal SA (Z(4)(0)) higher than 0.5 microm after myopic laser refractive surgery were included in the study at Vissum-Instituto Oftalmologico de Alicante, Spain...
January 2008: American Journal of Ophthalmology
A Kissner, M Kohlhaas, E Spörl, L E Pillunat
BACKGROUND: The corneal as well as the corneoscleral incisions are considered to be standard in cataract surgery. However, both incision techniques have their advantages and disadvantages. We investigated whether the way of performing the incisions has different effects on the corneal wavefront, especially on higher-order aberrations. METHODS: Each of 26 patients (6 men, 20 women), aged between 62 and 85 years (average 74.9 +/- 6.69 years), received a standard phakoemulsification by performing a corneal incision on the right eye (group 1) and a corneoscleral incision on the left eye (group 2)...
February 2007: Klinische Monatsblätter Für Augenheilkunde
Mike P Holzer, Martin Sassenroth, Gerd U Auffarth
PURPOSE: To evaluate the reliability of the SCHWIND Corneal and Ocular Wavefront Analyzers. METHODS: This study comprised 115 eyes of 58 healthy volunteers (26 [44.8%] women and 32 [55.2%] men) with no corneal or lenticular pathologies and normal visual acuity. All eyes underwent three consecutive measurements by one examiner with the Corneal Wavefront Analyzer and the Ocular Wavefront Analyzer (Hartmann-Shack principle). Corneal wavefront errors were calculated using the topography data, a standard eye model, and ray tracing...
November 2006: Journal of Refractive Surgery
David Zadok, Yaniv Barkana, Yair Levy, Haggay Avizemer
PURPOSE: To evaluate the visual acuity rehabilitation time after simultaneous bilateral photorefractive keratectomy (PRK) using a flying small spot laser. SETTING: Eye Tech Medical Laser, Tel Aviv, Israel. METHODS: In this prospective interventional nonrandomized clinical trial, 42 consecutive eyes (21 patients) with myopia ranging from -0.75 to -5.50 diopters (D) (mean -2.75 D +/- 1.18 [SD]) and astigmatism up to -2.75 D (mean -0.64 +/- 0...
January 2006: Journal of Cataract and Refractive Surgery
M Mrochen, M Kaemmerer, P Mierdel, T Seiler
PURPOSE: To study the clinical and theoretical effects of subclinical decentrations on the optical performance of the eye after photorefractive laser surgery. SETTING: Department of Ophthalmology, University of Dresden, Dresden, Germany. METHODS: Ocular aberrations were determined before and 1 month after uneventful photorefractive keratectomy (PRK) with the Multiscan laser (Schwind) in 10 eyes of 8 patients. The corrections ranged from -2...
March 2001: Journal of Cataract and Refractive Surgery
S K Rao, A C Cheng, D S Fan, A T Leung, D S Lam
PURPOSE: To evaluate the effect of preoperative keratometry on the refractive outcome after laser in situ keratomileusis (LASIK) for myopia. SETTING: University Eye Clinic, Prince of Wales Hospital, Hong Kong, China. METHODS: In this retrospective study, the records of patients who had LASIK for myopia greater than -6.0 diopters (D) using the Chiron Automated Corneal Shaper and the Schwind Keratome-F excimer laser were reviewed. RESULTS: Laser in situ keratomileusis was performed in 167 eyes of 103 patients (mean age 34...
February 2001: Journal of Cataract and Refractive Surgery
J Wachtlin, I E Blasig, S Schründer, K Langenbeck, F Hoffmann
PURPOSE: There are insufficient data on the possible cataractogenic side effects of excimer laser corneal surgery. Higher malondialdehyde (MDA) levels could indicate oxidative events related to the cataractogenic process. We therefore examined MDA levels after refractive laser surgery. METHODS: Six white Russian rabbits received laser in situ keratomileusis (LASIK) (Schwind keratome) in the right eye and a 250-microm-deep microkeratome cut (Schwind microkeratome) in the left eye...
January 2000: Cornea
P Rozsíval, A Feuermannová
OBJECTIVE: The purpose of the study was to evaluate the results of retreatment for low myopia after primary photorefractive keratectomy (PRK). DESIGN: A prospective study. PARTICIPANTS: A total of 48 eyes of 37 patients from 566 eyes of 331 patients originally treated for myopia of up to -6 diopters (D) were studied. INTERVENTION: Photorefractive keratectomy by the Coherent Schwind Keratom II excimer laser was performed...
July 1998: Ophthalmology
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