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https://www.readbyqxmd.com/read/28197998/laser-assisted-subepithelial-keratectomy-lasek-versus-laser-assisted-in-situ-keratomileusis-lasik-for-correcting-myopia
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/28095867/effects-of-ablation-depth-and-repair-time-on-the-corneal-elastic-modulus-after-laser-in-situ-keratomileusis
#8
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/28068442/oct-study-of-the-femtosecond-laser-opaque-bubble-layer
#9
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/28068440/a-prospective-study-to-compare-visual-outcomes-between-wavefront-optimized-and-topography-guided-ablation-profiles-in-contralateral-eyes-with-myopia
#10
Rohit Shetty, Rushad Shroff, Kalyani Deshpande, Roshan Gowda, Sumeet Lahane, Chaitra Jayadev
PURPOSE: To analyze refractive outcomes of wavefront-optimized (WFO) ablation and topography-guided custom ablation (TCAT) profiles using the Allegretto Wave excimer laser platform (Alcon Laboratories, Inc., Fort Worth, TX) in the treatment of myopia. METHODS: Sixty eyes of 30 patients who underwent LASIK were included in this prospective interventional study. WFO ablation was performed in one eye (WFO group) and TCAT in the fellow eye (TCAT group). The WaveLight FS200 femtosecond laser (Alcon Laboratories, Inc...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28031696/under-flap-stromal-bed-cxl-for-early-post-lasik-ectasia-a-novel-treatment-technique
#11
Avi Wallerstein, Eser Adiguzel, Mathieu Gauvin, Nima Mohammad-Shahi, Mark Cohen
PURPOSE: Collagen cross-linking (CXL) for post-laser-assisted in situ keratomileusis (LASIK) ectasia (PLE) is traditionally performed either epi-on or epi-off on the corneal surface. This study describes a novel technique in treating early PLE with under-flap CXL (ufCXL) to the stromal bed and reports on 6-month outcomes. PATIENTS AND METHODS: Case series of seven patients (eight eyes) with topography-diagnosed early PLE treated with ufCXL. Inclusion criteria were early, mild PLE defined as new-onset postoperative manifest refraction cylinder ≤1...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28007112/short-term-complications-of-femtosecond-laser-assisted-laser-in-situ-keratomileusis-cuts-review-of-1210-consecutive-cases
#12
Thomas Kohnen, Luisa Schwarz, Matthias Remy, Mehdi Shajari
PURPOSE: To evaluate short-term complications after femtosecond laser cuts for laser in situ keratomileusis (LASIK). SETTING: Department of Ophthalmology, Goethe University, Frankfurt, Germany. DESIGN: Retrospective consecutive case series. METHODS: Consecutive femtosecond laser cuts (1210 cuts in 624 patients) from LASIK performed with the Intralase FS60 between 2006 and 2014 were analyzed. The analysis looked at intraoperative and postoperative complications at 1 day, 1 week, and 1 month and factors with potential impact on the complication rate, such as ablation depth...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28007105/outcomes-and-complications-of-excimer-laser-surgery-in-patients-with-collagen-vascular-and-other-immune-mediated-inflammatory-diseases
#13
Julie M Schallhorn, Steven C Schallhorn, Keith A Hettinger, Jan A Venter, Martina Pelouskova, David Teenan, Stephen J Hannan
PURPOSE: To assess refractive and visual outcomes and postoperative complications in a large number of patients with well-controlled collagen vascular and other immune-mediated inflammatory diseases. SETTING: Optical Express, Glasgow, United Kingdom. DESIGN: Retrospective case series. METHODS: The files were reviewed of patients who had collagen vascular and other immune-mediated inflammatory diseases and who had excimer laser surgery between 2008 and 2015...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/27975341/refractive-lenticule-implantation-for-correction-of-ametropia-case-reports-and-literature-review
#14
A Lazaridis, A Messerschmidt-Roth, W Sekundo, S Schulze
The ReLEx® technique allows correction of refractive errors through the creation and extraction of refractive stromal lenticules. Contrary to excimer laser corneal refractive procedures, where the stromal tissue is photoablated, the extracted lenticules obtained with ReLEx® can be preserved. Recent studies and case reports have described autologous re-implantation and allogeneic implantation of refractive lenticules into femtosecond-laser created stromal pockets in order to reverse the refractive outcome of a myopic corneal refractive procedure, correct hyperopia, aphakia, presbyopia and treat keratoconus...
January 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/27956297/laser-in-situ-keratomileusis-flap-stability-in-an-aviator-following-aircraft-ejection
#15
Christopher J Richmond, Patrick D Barker, Edgar M Levine, Elizabeth M Hofmeister
: We present the case of a 28-year-old male F/A-18F Super Hornet naval flight officer who ejected from an aircraft at 13 000 feet at a speed in excess of 350 knots 7 years after uneventful laser in situ keratomileusis (LASIK). The patient was evaluated the day after the ejection. No LASIK flap complications or epithelial defects were found, and the corrected distance visual acuity was 20/15 in both eyes. FINANCIAL DISCLOSURE: None of the authors has a financial or proprietary interest in any material or method mentioned...
November 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/27938951/outcomes-of-photorefractive-keratectomy-following-laser-in-situ-keratomileusis-a-cohort-study
#16
Alfonso Iovieno, Joshua C Teichman, Stephanie Low, Sonia N Yeung, Marie Eve Lègarè, Alejandro D Lichtinger, Allan R Slomovic, David S Rootman
OBJECTIVE: To analyze the outcomes of photorefractive keratectomy (PRK) on residual myopia and hyperopia post-laser in situ keratomileusis (LASIK) and to compare these results with PRK on eyes without previous laser refractive surgery. DESIGN: Retrospective comparative cohort study. PARTICIPANTS: Patients undergoing PRK between 2006 and 2010 were reviewed. METHODS: Patients were divided into 4 groups, myopic or hyperopic PRK post-LASIK (mPRK-PL and hPRK-PL, respectively) and myopic or hyperopic PRK on corneas without previous laser refractive surgery (mPRK and hPRK, respectively)...
December 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/27920492/flap-double-twist-technique-for-prevention-of-lasik-flap-striae
#17
Karim Mahmoud Nabil
A novel flap double twist technique was applied to reduce the incidence of post-laser-assisted in situ keratomileusis (LASIK) flap striae. The flap is floated and stroked in the same way as is done for management of first postoperative day striae, where the method is to float and irrigate the flap into position, followed by applying gentle pressure on the flap with a wet Merocel microsponge and moving the flap away from the hinge position. The sponge is then manually squeezed to become drier, and the flap is continuously stroked in a direction opposite to the hinge...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27899387/activation-of-cytomegalovirus-corneal-endotheliitis-following-laser-in-situ-keratomileusis
#18
Tien-En Tan, Chui Ming Gemmy Cheung, Jodhbir S Mehta
A case of Cytomegalovirus (CMV) corneal endotheliitis following laser in-situ keratomileusis (LASIK) is presented. A 32-year-old man presented 3 weeks after uncomplicated myopic LASIK with unilateral LASIK flap oedema, interface fluid accumulation, keratic precipitates, anterior uveitis and raised intraocular pressure. Despite treatment with topical corticosteroids, he had 3 further recurrent episodes. Specular microscopy showed decreased endothelial cell density and aqueous humour. Polymerase chain reaction (PCR) testing was positive for CMV DNA...
November 29, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27824384/refractive-lenticule-transplantation-for-correction-of-iatrogenic-hyperopia-and-high-astigmatism-after-lasik
#19
Apostolos Lazaridis, Dan Z Reinstein, Timothy J Archer, Stephan Schulze, Walter Sekundo
PURPOSE: To design a technique for intrastromal transplantation of stromal lenticules with specific refractive power for correction of post-LASIK induced hyperopia and astigmatism. METHODS: A 28-year-old patient was referred for consultation after complicated LASIK for moderate myopia and astigmatism. The refractive error of the right eye was severely overcorrected due to data entry error. Post-LASIK refraction showed high astigmatism (right eye: +6.50 -9.00 @ 84°) and corrected distance visual acuity (CDVA) of 20/32...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27803856/effect-of-femtosecond-and-microkeratome-flaps-creation-on-the-cornea-biomechanics-during-laser-in-situ-keratomileusis-one-year-follow-up
#20
Qian Sun, Zheng-Zheng Deng, Yue-Hua Zhou, Jing Zhang, Xiao-Yan Peng
AIM: To compare the corneal biomechanical outcomes at one year after laser in situ keratomileusis (LASIK) with the flaps created by Ziemer and Moria M2 microkeratome with 110 head and -20 blade. METHODS: Totally 100 eyes of 50 consecutive patients were enrolled in this prospective study and divided into two groups for corneal flaps created by ZiemerFemto LDV and Moria M2 microkeratome with 110 head and -20 blade. Corneal biomechanical properties including cornea resistance factor (CRF) and cornea hysteresis (CH) were measured before and 1, 3, 6, 12mo after surgery by ocular response analyzer...
2016: International Journal of Ophthalmology
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