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Corneal surgery

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https://www.readbyqxmd.com/read/28101654/cell-viability-and-shock-wave-amplitudes-in-the-endothelium-of-porcine-cornea-exposed-to-ultrashort-laser-pulses
#1
Syed Asad Hussain, Carles Milián, Caroline Crotti, Laura Kowalczuk, Fatima Alahyane, Zacaria Essaïdi, Arnaud Couairon, Marie-Claire Schanne-Klein, Karsten Plamann
PURPOSE: Some forms of keratoplasty assisted by ultrashort-pulse lasers require performing laser cuts close to the endothelium, which requires the knowledge of "safe" values concerning incision depth and pulse energy preserving endothelial cell viability. Our study aims to determine the thresholds for cell death in porcine corneas exposed to ultrashort laser pulses, in terms of laser pulse energy and nearness of the impacts to the endothelium. METHODS: Using a laboratory laser set-up, lamellar cuts were induced while varying pulse energies and distances from the endothelium...
January 18, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28100180/extensive-bilateral-corneal-edema-6%C3%A2-weeks-after-cataract-surgery-keratopathy-due-to-asclepias-physocarpa-a-case-report
#2
Kazuki Matsuura, Shiro Hatta, Yuki Terasaka, Yoshitsugu Inoue
BACKGROUND: Surgeons may be unaware of the ability of plant toxins to cause corneal damage. Therefore, corneal damage following intraocular surgery due to plant toxins may be misdiagnosed as postoperative infection. CASE PRESENTATION: A 74-year-old man presented with hyperemia and reduced visual acuity in both eyes 6 weeks after uneventful cataract surgery. We observed extensive hyperemia and corneal stromal edema with Descemet's folds in both eyes. After obtaining a detailed patient history, we diagnosed plant toxin-induced corneal edema due to Asclepias physocarpa, which can induce corneal edema by inhibiting the Na(+)/K(+) ATPase activity of the corneal endothelium...
January 18, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28099281/vision-related-quality-of-life-before-and-after-deep-anterior-lamellar-keratoplasty
#3
Elvin Yildiz, Meltem Toklu, Ece Turan Vural
OBJECTIVES: To determine changes in the vision-related quality of life in patients undergoing deep anterior lamellar keratoplasty (DALK) by using the 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25). METHODS: Thirty-five patients who were scheduled for DALK between March 1, 2013, and March 1, 2014 were asked to complete the NEI VFQ-25. NEI VFQ-25 was administered again at 6 months and at 1 year postoperatively. Data on patients' age, sex, preoperative diagnosis, preoperative and postoperative best-corrected visual acuity, and postoperative astigmatism were recorded...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28096654/comparison-of-visian-toric-collamer-lens-and-toric-acrylic-intraocular-lens-implantation-for-the-treatment-of-myopia-with-astigmatism
#4
Hatem Ammar, Mohamed Anbar, Marwa M Abdellah
PURPOSE: To compare the efficacy and outcome of phakic toric implantable collamer lens (TICL) and refractive clear lens extraction with AcrySof Toric intraocular lens (TIOL) implantation for the treatment of myopic astigmatism. PATIENTS AND METHODS: This study assessed eyes with myopic astigmatism >-1 D and ≤-4 D with a spherical equivalent >10 D or <10 D if the patients were unsuitable for corneal refractive surgery. These eyes were divided into group A, in which Visian Toric ICL™ Phakic TICL was implanted, and group B, which involved clear lens extraction with implantation of an AcrySof IQ toric SN60T3-9™ IOL...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28096651/effects-of-3-diquafosol-sodium-ophthalmic-solution-on-higher-order-aberrations-in-patients-diagnosed-with-dry-eye-after-cataract-surgery
#5
Yasushi Inoue, Shintarou Ochi
PURPOSE: To evaluate the effects of diquafosol sodium ophthalmic solution 3% (DQS) and artificial tears (AT) on higher-order aberrations (HOAs) in patients with dry eye after cataract surgery. DESIGN: This was a post hoc analysis of a previously conducted randomized clinical study. METHODS: Fifty-nine eyes from 42 patients (17 males and 25 females, aged 72.6±8.0 years) with verified or suspected dry eye at 4 weeks after cataract surgery were evaluated...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28095867/effects-of-ablation-depth-and-repair-time-on-the-corneal-elastic-modulus-after-laser-in-situ-keratomileusis
#6
Xiaojun Wang, Xiaona Li, Weiyi Chen, Rui He, Zhipeng Gao, Pengfei Feng
BACKGROUND: The biomechanical properties of the cornea should be taken into account in the refractive procedure in order to perform refractive surgery more accurately. The effects of the ablation depth and repair time on the elastic modulus of the rabbit cornea after laser in situ keratomileusis (LASIK) are still unclear. METHODS: In this study, LASIK was performed on New Zealand rabbits with different ablation depth (only typical LASIK flaps were created; residual stroma bed was 50 or 30% of the whole cornea thickness respectively)...
January 17, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28094043/incidence-and-clinical-course-of-immune-reactions-after-descemet-membrane-endothelial-keratoplasty-retrospective-analysis-of-1000-consecutive-eyes
#7
Deniz Hos, Onur Tuac, Friederike Schaub, Tisha P Stanzel, Silvia Schrittenlocher, Martin Hellmich, Björn O Bachmann, Claus Cursiefen
PURPOSE: To analyze the incidence and clinical course of graft rejection episodes after Descemet membrane endothelial keratoplasty (DMEK). DESIGN: Retrospective analysis of a consecutive, interventional case series. PARTICIPANTS: One thousand eyes that underwent DMEK from July 2011 through August 2015 at the Department of Ophthalmology, University of Cologne. METHODS: All cases with follow-up of at least 1 month were included (mean follow-up, 18...
January 13, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28091897/comparative-analysis-of-the-visual-and-refractive-outcomes-of-a-refractive-segmented-multifocal-intraocular-lens-with-and-without-toricity-1-year-results
#8
Ryo Shodai, Kazuno Negishi, Hiroyuki Arai, Ikuko Toda, Hidemasa Torii, Kazuo Tsubota
PURPOSE: To compare the visual and refractive outcomes up to 1 year postoperatively following implantation of a refractive segmented or a refractive segmented toric multifocal intraocular lens (IOL). METHODS: This retrospective study included 108 eyes of 64 patients who underwent cataract surgery with implantation of a refractive segmented multifocal IOL (Lentis Mplus LS-313 MF30 IOL) (LM group) and 81 eyes of 49 patients with implantation of a refractive segmented toric multifocal IOL (Lentis Mplus LU-313 MF30T IOL) (LMT group)...
January 13, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28091428/refractive-aim-and-visual-outcome-after-phacoemulsification-a-2-year-review-from-a-tertiary-private-eye-hospital-in-sub-saharan-africa
#9
O Oderinlo, A O Hassan, F O Oluyadi, A O Ogunro, O N Okonkwo, M O Ulaikere, O Ashano
AIM: To review the short-term visual outcome of phacoemulsification in adults with uncomplicated cataracts in Eye Foundation Hospital, Lagos, Nigeria. MATERIALS AND METHODS: A retrospective review of records of patients that had phacoemulsification between January 2012 and December 2013 in Eye Foundation Hospital, Lagos, Nigeria, was done. Preoperative visual acuity, refractive aim, intraoperative complications, postoperative unaided, and best-corrected visual acuity at 1 and 3 months were analyzed...
February 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28089285/thick-keratoconic-cornea-associated-with-posterior-polymorphous-corneal-dystrophy
#10
K Zaarour, E Slim, J Antoun, N Waked
INTRODUCTION: We herein report a case of bilateral unusually thick non-edematous keratoconic corneas with associated endothelial features of posterior polymorphous corneal dystrophy (PPCD). CASE REPORT: We report the case of a 27-year-old myopic woman who presented for refractive surgery. Slit lamp exam showed bilateral corneal protrusion with diffuse deep stromal and endothelial vesicular opacities and small paracentral bands. Topography showed generalized advanced corneal steepening in both eyes with increased anterior and posterior central corneal elevations in comparison to the best fit sphere...
January 12, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28086913/correction-of-irregular-and-induced-regular-corneal-astigmatism-with-toric-iol-after-posterior-segment-surgery-a-case-series
#11
Bence L Kolozsvári, Gergely Losonczy, Dorottya Pásztor, Mariann Fodor
BACKGROUND: Toric intraocular lens (IOL) implantation can be an effective method for correcting corneal astigmatism in patients with vitreoretinal diseases and cataract. Our purpose is to report the outcome of toric IOL implantation in two cases - a patient with scleral-buckle-induced regular corneal astigmatism and a patient with keratoconus following pars plana vitrectomy. As far as we are aware, there are no reported cases of toric IOL implantation in a vitrectomized eye with keratoconus nor of toric IOL implantation in patients with scleral-buckle-induced regular corneal astigmatism...
January 13, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28076565/effect-of-corneal-biomechanical-properties-on-surgically-induced-astigmatism-and-higher-order-aberrations-after-cataract-surgery
#12
Mustafa Koç, Çağrı İlhan, Yaran Koban, Kemal Özülken, İrfan Durukan, Pelin Yılmazbaş
Purpose: To investigate the relationship between biomechanical properties of the cornea and postoperative refractive changes in patients with low-level astigmatism after cataract surgery. Methods: This prospective study recruited patients undergoing cataract surgery involving 2.8-mm superior incisions. Biomechanical properties of the cornea were evaluated preoperatively using the Ocular Response Analyzer, and corneal profiles were evaluated using a Scheimpflug system (Pentacam HR)...
November 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28068448/photorefractive-keratectomy-with-mitomycin-c-in-meesmann-s-epithelial-corneal-dystrophy
#13
Ramon Coral Ghanem, André Luís Piccinini, Vinícius Coral Ghanem
PURPOSE: To describe a case of Meesmann's epithelial corneal dystrophy that underwent photorefractive keratectomy (PRK) with mitomycin C. METHODS: Case report. RESULTS: A 36-year-old woman was evaluated for refractive surgery. She had a history of recurrent epithelial erosions and moderate visual loss over the past 10 years. Biomicroscopy revealed bilateral micro-cystic epithelial lesions and a diagnosis of Meesmann's epithelial corneal dystrophy was proposed...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28068447/corneal-ectasia-after-lasik-combined-with-prophylactic-corneal-cross-linking
#14
Suphi Taneri, Saskia Kiessler, Anika Rost, H Burkhard Dick
PURPOSE: To report a case of unilateral corneal ectasia following LASIK surgery combined with prophylactic corneal cross-linking (CXL) in a young patient. METHODS: Case report. RESULTS: Preoperative topography was unremarkable in both eyes with a minimum corneal thickness of 554 μm in the right eye and 546 μm in the left eye. Preoperative corrected distance visual acuity (CDVA) was 1.0 (20/20 Snellen) in both eyes with a refraction of +1...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28068442/oct-study-of-the-femtosecond-laser-opaque-bubble-layer
#15
Gustavo K Marino, Marcony R Santhiago, Steven E Wilson
PURPOSE: To characterize the location and regularity of the opaque bubble layer (OBL) in the corneal stroma after femtosecond laser-assisted LASIK (FS-LASIK) flap generation. METHODS: In this prospective study, 30 eyes of 15 patients who had FS-LASIK surgery for myopia, astigmatism, and/or hyperopia were included. Screen captures were obtained at the end of the flap creation and the eyes with hard type OBL were immediately imaged with anterior segment optical coherence tomography...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28062421/intraoperative-oct-assisted-descemetopexy-with-stromal-vent-incisions-and-intracameral-gas-injection-for-case-of-non-resolving-descemet-s-membrane-detachment
#16
Archita Singh, Murugesan Vanathi, Suman Sahu, Saranya Devi
Descemet's membrane detachment (DMD) though uncommon in the present day scenario of advancing surgical techniques is a significant complication that requires prompt diagnosis and management. A middle-aged man presented to our hospital with poor gain of vision following cataract surgery. There was significant corneal oedema with DMD which was confirmed on anterior segment optical coherence tomography. We describe a modified continuous intraoperative-guided approach for the management of DMD in cases with oedematous hazy corneas...
January 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28061513/angiopoietin-2-blockade-promotes-survival-of-corneal-transplants
#17
Liwei Zhang, Guangyu Li, Roberto Sessa, Gyeong Jin Kang, Meng Shi, Shaokui Ge, Anna Jiang Gong, Ying Wen, Sudhakar Chintharlapalli, Lu Chen
Purpose: Corneal transplantation remains the last hope for vision restoration, and lymphangiogenesis (LG) is a primary mediator of transplant rejection. This study was to investigate the specific role of angiopoietin-2 (Ang-2) in transplantation-associated LG and graft rejection. Methods: Orthotopic corneal transplantation was performed between fully mismatched C57BL/6 (donor) and BALB/c (recipient) mice to assess the effects of Ang-2 blockade via neutralizing antibody...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28060075/removal-and-repositioning-of-intracorneal-ring-segments-improving-corneal-topography-and-clinical-outcomes-in-keratoconus-and-ectasia
#18
Kahei Chan, Peter S Hersh
PURPOSE: To evaluate the efficacy of removal and relocation of intracorneal ring segments for improving outcomes in treatment of keratoconus and corneal ectasia. METHODS: This is a retrospective case series conducted at a cornea and refractive surgery subspecialty practice setting. Patients with previous insertion of 2 intracorneal ring segments underwent surgical removal and repositioning of segments because of unsatisfactory visual and topographic outcomes. The principal outcomes included uncorrected and corrected visual acuities, manifest refraction, topography-derived maximum keratometry (Kmax), inferior-superior topography power difference (I - S), and higher-order aberration profile derived from wavefront analysis...
February 2017: Cornea
https://www.readbyqxmd.com/read/28060074/eventual-endothelial-failure-after-initial-corneal-clearing-after-a-detached-endothelial-graft-in-fuchs-dystrophy
#19
Hyunjoo J Lee, Wuqaas M Munir
PURPOSE: To report a case of eventual corneal endothelial cell failure after spontaneous resolution of corneal edema after failed Descemet membrane endothelial keratoplasty (DMEK). METHODS: Retrospective case report. RESULTS: A 56-year-old man with Fuchs endothelial corneal dystrophy underwent cataract and DMEK surgery in the left eye. The transplanted DMEK graft detached in the early postoperative period and formed a peripheral scroll. Despite graft detachment, corneal edema resolved with endothelial cell repopulation of the central cornea...
February 2017: Cornea
https://www.readbyqxmd.com/read/28060071/corneal-lenticule-allotransplantation-after-femtosecond-laser-small-incision-lenticule-extraction-in-rabbits
#20
Jing Zhao, Yang Shen, Mi Tian, Ling Sun, Yu Zhao, Xiaoyu Zhang, Xingtao Zhou
PURPOSE: To investigate the feasibility of allotransplanting extracted lenticules after femtosecond laser-assisted small incision lenticule extraction (SMILE) in rabbits and the subsequent healing process. METHODS: Fourteen New Zealand white rabbits were divided evenly into 2 groups. The rabbits in group A received SMILE procedures with a -6.00 D correction. The lenticules from group A were immediately inserted into a femtosecond laser-created corneal stromal pocket in group B...
February 2017: Cornea
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