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https://www.readbyqxmd.com/read/28594648/risk-profiles-of-ectasia-after-keratorefractive-surgery
#1
Pushpanjali Giri, Dimitri T Azar
PURPOSE OF REVIEW: To identify and evaluate the risk factors of iatrogenic ectasia after refractive surgery. RECENT FINDINGS: We reviewed recently published papers that identified various risk factors associated with ectasia after LASIK, photorefractive keratectomy, small incision lenticule extraction, and other refractive surgical procedures. We also attempted to evaluate the relative contributions of these factors to the development of ectasia following refractive surgery...
July 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28589448/-laser-in-situ-keratomileusis-with-microkeratome-or-femtosecond-laser
#2
REVIEW
T Kohnen, G Steinwender
OBJECTIVE AND PRINCIPLES: In LASIK, after cutting a lamellating stromal corneal incision (flap) with a microkeratome or a femtosecond laser, the underlying tissue is treated with an excimer laser for refractive correction. The objective is to achieve independency from spectacles and contact lenses due to correction of ametropia. INDICATIONS: Surgery is indicated when the patient wishes to achieve independency from spectacles and contact lenses. For LASIK, the German Commission for Refractive Surgery defined a range of applicability for myopic correction up to -8 diopters (D), astigmatic correction up to 5 D and hyperopic correction up to +3 D...
June 6, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28586502/biomechanical-changes-after-lasik-flap-creation-combined-with-rapid-cross-linking-measured-with-brillouin-microscopy
#3
J Bradley Randleman, Johnny P Su, Giuliano Scarcelli
PURPOSE: To evaluate the biomechanical changes occurring after LASIK flap creation and rapid corneal cross-linking (CXL) measured with Brillouin light microscopy. METHODS: Porcine eyes (n = 11) were evaluated by Brillouin light microscopy sequentially in the following order: virgin state, after LASIK flap creation, and after rapid CXL. Each eye served as its own control. Depth profile of the Brillouin frequency shift was computed to reveal the depth-dependent changes in corneal stiffness...
June 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28585430/satisfactory-clinical-outcome-following-delayed-repositioning-of-a-traumatic-post-lasik-flap-with-dislocation-and-shrinkage-managed-by-irrigation-stretching-and-debridement
#4
Ye-Sheng Xu, Wen-Jia Xie, Yu-Feng Yao
OBJECTIVE: To report surgical management and favorable outcome in a case with delayed repair of traumatic laser in situ keratomileusis (LASIK) flap dislocation with shrinkage and folds. METHODS: A 30-year-old man with a five-year history of bilateral LASIK experienced blunt trauma to his right eye followed by decreased vision for 5 weeks. The surgical management included initially softening the flap by irrigation with balanced salt solution (BSS). The shrinkage folds were carefully and gently stretched by scraping with a 26-gauge cannula accompanied by BSS irrigation...
June 2017: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/28458585/traumatic-corneal-flap-displacement-after-laser-in-situ-keratomileusis-lasik
#5
Tsung-Han Tsai, Kai-Ling Peng, Chien-Jen Lin
BACKGROUND: Laser in situ keratomileusis (LASIK) is the most common and popular procedure performed for the correction of refractive errors in the last two decades. We report a case of traumatic flap displacement with flap folding which occurred 3 years after LASIK was performed. Previous literature suggests that vision prognosis would be closely related to proper and prompt management of traumatic flap displacement with flap folding 3 years after LASIK. CASE PRESENTATION: A 23-year-old female presented to our hospital who had undergone uneventful LASIK in both eyes 3 years prior...
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28424534/corneal-flap-thickness-with-the-moria-m2-single-use-head-90-microkeratome-in-72-consecutive-lasik-procedures
#6
Yunus Karabela, Orkun Muftuoglu, Faruk Kaya
PURPOSE: This study aimed to evaluate the accuracy and consistency of corneal flap thickness in laser-assisted in situ keratomileusis (LASIK) with the Moria M2 single-use head 90 microkeratome. METHODS: The central corneal thickness of 72 (37 right, 35 left) eyes of 37 patients was measured by ultrasonic pachymetry preoperatively and intraoperatively after flap cut. The Moria M2 single-use head 90 microkeratome was used to create a superior hinged flap in all eyes...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28420926/femto-lasik-the-recent-innovation-in-laser-assisted-refractive-surgery
#7
Zubair Shahid Bashir, Muhammad Hassaan Ali, Ayesha Anwar, Muhammad Hammad Ayub, Nadeem Hafeez Butt
Femtosecond laser has been introduced in refractive surgery to create a thin-hinged corneal flap without using any blade. The current review was planned to analyse and compare femtosecond-assisted laser in-situ keratomileusis (LASIK), the latest refractive procedure, with conventional techniques in refractive surgery. The analysis showed that femtosecond-assisted LASIK yielded more predictable corneal flaps, lesser ocular aberrations, better uncorrected visual acuity, lesser variations in intraocular pressure (IOP) and fewer chances of developing dry eyes...
April 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28387767/femtosecond-laser-assisted-in-situ-keratomileusis-for-the-correction-of-residual-ametropia-after-deep-anterior-lamellar-keratoplasty-a-pilot-investigation
#8
A Balestrazzi, A Balestrazzi, F Menicacci, G Cartocci, F Menicacci, P Michieletto, E Balestrazzi
PurposeTo evaluate the refractive and visual results of one-stage laser-assisted in situ keratomileusis with femtosecond laser (Femto-LASIK) for the correction of residual ametropia after deep anterior lamellar keratoplasty (DALK).MethodsThis retrospective study included 13 eyes of 12 patients, who underwent corneal Femto-LASIK to correct refractive errors after DALK. IntraLase FS150 was used to create a lamellar flap and excimer laser ablation for refractive correction was performed using the Star S4 IR Excimer Laser in eight cases and the Technolas 217z Excimer Laser in Tissue Saving mode in five cases...
April 7, 2017: Eye
https://www.readbyqxmd.com/read/28380104/complete-depigmentation-of-a-small-aperture-corneal-inlay-implanted-for-compensation-of-presbyopia
#9
Mauro Campos, Sandra Beer, Eliane Mayumi Nakano, Cristina Muccioli, Rubens Belfort, Wallace Chamon
We describe a case of late-onset remarkable depigmentation of a small aperture corneal inlay implanted for presbyopia compensation. The patient was a participant in a clinical trial designed to evaluate the safety and efficacy of the AcuFocusTM ACU-10R160, which is a 10 µm-thick polyimide film tinted with an organic dye. Inlay implantation occurred under mechanical microkeratome Lasik flaps set for a depth of 120 µm. The patient returned to the clinic 11 years after surgery and reported loss of near-vision acuity...
January 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28359626/effects-of-femtosecond-and-excimer-lasers-on-implanted-kamra-corneal-inlay-in-animal-models
#10
F K Sammouh, T A Baban, W N Dandan, E L Warrak
PURPOSE: To evaluate the effect of femtosecond laser and excimer laser on an intracorneal inlay (KAMRA(®)) implanted in animal models. METHODS: Femtosecond laser was used to create corneal intrastromal pockets at 250μm depth in five porcine eyes. Four intact KAMRA inlays, examined by slit-lamp biomicroscopy and light microscopy, were implanted in the pocket of four eyes. A standard LASIK flap was created above each implanted inlay in the four eyes using a femtosecond laser with flap thicknesses of 150μm, 130μm, 110μm and 90μm...
May 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28355171/glaucoma-mini-shunt-implantation-after-keratoplasty
#11
Jasbeth Ledesma-Gil, María de Los Ángeles García-Rodríguez, Lulu U Gurria, Enrique O Graue-Hernández, Alejandro Navas
PURPOSE: To report the outcomes of patients who underwent miniature glaucoma shunt implantation after secondary glaucoma due to keratoplasty. MATERIALS AND METHODS: Prospective study of consecutive clinical cases who underwent mini-glaucoma shunt implantation following keratoplasty. In brief, a fornix-based conjunctival flap was performed, approximately 50% thickness scleral flap. Mitomycin C 0.025% placed under Tenon's capsule. A 25-G needle created entry for mini-shunt...
April 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28264134/biomechanical-weakening-of-different-re-treatment-options-after-small-incision-lenticule-extraction-smile
#12
Sabine Kling, Bogdan Spiru, Farhad Hafezi, Walter Sekundo
PURPOSE: To determine the corneal weakening induced by different re-treatment options after small incision lenticule extraction (SMILE) and investigate the potential of corneal cross-linking (CXL) to reestablish the original corneal stress resistance. METHODS: A total of 96 freshly enucleated porcine corneas were used. The initial refractive correction was defined to be -11.00 diopters (D) and the required enhancement to be -3.00 D. Three different re-treatment options were analyzed: -3D Re-SMILE, -3D photorefractive keratectomy (PRK) on top of the SMILE cap, and cap-to-flap conversion and -3D excimer ablation on the stromal bed (LASIK)...
March 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28264132/influences-of-flap-shape-and-hinge-angle-on-opaque-bubble-layer-formation-in-femtosecond-laser-assisted-lasik-surgery
#13
Hung-Yuan Lin, Yi-Ting Fang, Ya-Jung Chuang, Han-Chieh Yu, Christy Pu, Yiing-Jenq Chou, Chih-Yi Chien, Pi-Jung Lin, Steven C Schallhorn, Chi-Chin Sun
PURPOSE: To evaluate the effects of different flap shapes and hinge angles on opaque bubble layer (OBL) formation using a femtosecond laser for flap creation in LASIK surgery. METHODS: This retrospective study evaluated 138 eyes of 73 patients who underwent femtosecond laser-assisted LASIK with a 150-kHz IntraLase femtosecond laser (Abbott Medical Optics, Inc., Santa Ana, CA) for myopic astigmatism and compared differences between different flap shapes and hinge angles on OBL formation...
March 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28197998/laser-assisted-subepithelial-keratectomy-lasek-versus-laser-assisted-in-situ-keratomileusis-lasik-for-correcting-myopia
#14
REVIEW
Jocelyn Kuryan, Anjum Cheema, Roy S Chuck
BACKGROUND: Near-sightedness, or myopia, is a condition in which light rays entering the eye along the visual axis focus in front of the retina, resulting in blurred vision. Myopia can be treated with spectacles, contact lenses, or refractive surgery. Options for refractive surgery include laser-assisted subepithelial keratectomy (LASEK) and laser-assisted in-situ keratomileusis (LASIK). Both procedures utilize a laser to shape the corneal tissue (front of the eye) to correct refractive error, and both create flaps before laser treatment of corneal stromal tissue...
February 15, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28192591/lasik-enhancement-clinical-and-surgical-management
#15
Majid Moshirfar, Naz Jehangir, Carlton R Fenzl, Michael McCaughey
PURPOSE: To review refractive regression and current therapeutic options for patients who have residual refractive error after LASIK. METHODS: An extensive literature search using PubMed was performed for terms such as "LASIK," "PRK," "enhancement," "overcorrection," "undercorrection," "re-lift," "mini-flap," and related terms. RESULTS: The presence of residual refractive error following LASIK is a challenging situation. After excluding anatomical causes (eg, ocular surface disease, cataract, and macular pathology) and intraoperative flap complications, evaluation of the residual stromal bed must be performed...
February 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28192588/conventional-versus-inverted-side-cut-flaps-for-femtosecond-laser-assisted-lasik-laboratory-and-clinical-evaluation
#16
Vishal Jhanji, Tommy C Y Chan, Wai Ying Li, Rayne R Lim, Marco C Y Yu, Kasin Law, Peng Yi, Yolanda W Y Yip, Yumeng Wang, Tsz Kin Ng, Shyam S Chaurasia, Rajiv R Mohan
PURPOSE: To study the differences in early corneal cellular events and biomechanical properties after femtosecond laser-assisted LASIK performed using conventional or inverted side-cut angles. METHODS: In the laboratory study, left eyes of 24 rabbits underwent LASIK flap creation with a 70° or 115° side-cut. The contralateral eyes served as controls. The corneas were harvested 24 hours postoperatively. In the clinical study, 2 eyes of each patient (n = 29) were randomized to corneal flap creation with 70° or 115° side-cut angles during LASIK...
February 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28187180/comparative-evaluation-of-visual-outcomes-and-corneal-asphericity-after-laser-assisted-in-situ-keratomileusis-with-the-six-dimension-amaris-excimer-laser-system
#17
JunJie Piao, Ying-Jun Li, Woong-Joo Whang, Mihyun Choi, Min Ji Kang, Jee Hye Lee, Geunyoung Yoon, Choun-Ki Joo
PURPOSE: To compare the visual and refractive outcomes after laser-assisted in situ keratomileusis (LASIK) surgery for correction of myopia or myopic astigmatism using a six-dimensional Amaris excimer laser. METHODS: In this retrospective cohort study, we enrolled 47 eyes of 28 patients (age: 19-36 years) with myopia or myopic astigmatism. We used the Custom Ablation Manager protocol and performed ablations with the SCHWIND AMARIS system. LASIK flaps were cut with an iFS Advanced Femtosecond Laser...
2017: PloS One
https://www.readbyqxmd.com/read/28168049/photorefractive-keratectomy-for-residual-myopia-after-myopic-laser-in-situ-keratomileusis
#18
Kamal A M Solaiman, Sameh M Fouda, Ashraf Bor'i, Haitham Y Al-Nashar
Purpose. To evaluate the safety, efficacy, and predictability of photorefractive keratectomy (PRK) on the corneal flap for correction of residual myopia following myopic laser in situ keratomileusis (LASIK). Patients and Methods. A retrospective study on eyes retreated by PRK on the corneal flap for residual myopia after LASIK. All eyes had no enough stroma after LASIK sufficient for LASIK enhancement. Data included spherical equivalent (SE), uncorrected and best corrected visual acuity (UCVA and BCVA), central pachymetry, corneal higher order aberrations (HOAs), corneal hysteresis (CH), corneal resistance factor (CRF), and corneal haze...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28163860/refinement-of-intraocular-pressure-measurements-made-by-ocular-response-analyzer-following-laser-in-situ-keratomileusis-using-m2-90-moria-microkeratome-for-egyptian-myopic-and-astigmatic-patients
#19
Tamer Adel Refai, Olfat A Hassanin
INTRODUCTION: The Goldmann applanation tonometer readings were noted to be markedly reduced after Lasik surgery using a thin flap technique which is widely used nowadays, to correct a wide range of myopia and astigmatism. The Ocular Response Analyzer (ORA) is considered one of the important tools for refinement of Intraocular Pressure (IOP) measurements. The aim of this study is to evaluate and refine ORA measurements for IOP changes post- M2 90 Moria microkeratome Lasik procedure for Egyptian myopic and astigmatic patients trying to aid in glaucoma diagnosis and management...
December 2016: Electronic Physician
https://www.readbyqxmd.com/read/28162196/-comparison-of-the-effects-of-different-side-cut-angles-on-corneal-biomechanical-properties-after-femtosecond-laser-assisted-laser-in-situ-keratomileusis
#20
H Li, Y Wang, R Dou, L Wang, L L Xu, X J Li, J M Zhang
Objective: To evaluate the effects of side-cut angles on corneal biomechanical properties after femtosecond laser assisted-laser in situ keratomileusis (FS-LASIK). Methods: In this clinical control study, 97 right eyes of 97 patients with myopia and myopic astigmatism undergoing FS-LASIK surgery were included randomly. Two types of side-cut angles were designed for the flap, 90° in 48 eyes and 130° in 49 eyes. The values of corneal resistance factor (CRF), cornea hysteresis (CH) and 37 biomechanical waveform parameters were measured using the ocular response analyzer preoperatively and at 1 and 3 months postoperatively...
January 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
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