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femtosecond lasik

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https://www.readbyqxmd.com/read/28622316/corneal-densitometry-after-photorefractive-keratectomy-laser-assisted-in-situ-keratomileusis-and-small-incision-lenticule-extraction
#1
F Poyales, N Garzón, J Mendicute, I Illarramendi, P Caro, O Jáñez, F Argüeso, A López
PurposeThe aim of this study was to gain greater insight into the corneal densitometry changes occurring as a result of refractive surgery and to compare these changes across three widely used surgical techniques, namely, photorefractive keratectomy (PRK), laser-assisted in situ keratomileusis with a femtosecond laser (LASIK-FS), or ReLEx small-incision lenticule extraction (ReLEx SMILE).Patients and methodsThree hundred and thirty-six patients (184 male and 152 female patients) participated in this study. They were split into three groups according to the refractive surgery technique they had undergone: LASIK-FS (74 patients), PRK (153 patients), and ReLEx SMILE (109 patients)...
June 16, 2017: Eye
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/28586497/a-three-year-observation-of-corneal-backscatter-after-small-incision-lenticule-extraction-smile
#3
Tian Han, Jing Zhao, Yang Shen, Yingjun Chen, Mi Tian, Xingtao Zhou
PURPOSE: To investigate changes in corneal backscatter after small incision lenticule extraction (SMILE). METHODS: One eye was randomly selected from 34 patients who underwent SMILE procedures. Corneal backscatter was analyzed using Scheimpflug technology before surgery and at postoperative 1 day, 1 week, 1 month, 3, 6, and 12 months, and 3 years. Three different corneal depths (the anterior 120 µm, the center, and the posterior 60 µm) and three concentric radial zones (0 to 2, 2 to 6, and 6 to 10 mm) were analyzed...
June 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28586496/small-incision-lenticule-extraction-smile-for-hyperopia-optical-zone-diameter-and-spherical-aberration-induction
#4
Dan Z Reinstein, Kishore R Pradhan, Glenn I Carp, Timothy J Archer, Marine Gobbe, Walter Sekundo, Raynan Khan, Purushottam Dhungana
PURPOSE: To evaluate optical zone diameter efficacy and spherical aberration change in hyperopic small incision lenticule extraction (SMILE). METHODS: Prospective study of 60 consecutive hyperopic SMILE procedures using the VisuMax femtosecond laser (Carl Zeiss Meditec, Jena, Germany) and matched LASIK procedures with the VisuMax and MEL 80 excimer (Carl Zeiss Meditec) lasers. Inclusion criteria were maximum attempted hyperopic meridian of between +1.00 and +7.00 diopters (D)...
June 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28503439/dry-eye-and-corneal-sensitivity-after-small-incision-lenticule-extraction-and-femtosecond-laser-assisted-in-situ-keratomileusis-a-meta-analysis
#5
Wen-Ting Cai, Qing-Yu Liu, Cheng-Da Ren, Qing-Quan Wei, Jun-Ling Liu, Qian-Yi Wang, Ya-Ru Du, Meng-Mei He, Jing Yu
AIM: To assess the corneal sensitivity and the incidences of dry eye after small incision lenticule extraction (SMILE) and femtosecond laser-assisted in situ keratomileusis (FS-LASIK). METHODS: The Meta-analysis was performed using RevMan 5.3. We searched on PubMed from inception to March 2016. Summary weighted mean difference (WMD) and 95% confidence intervals (CIs) were used to analyze the datum. Random-effects or fixed-effects models were chosen up to between-study heterogeneity...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28503438/comparison-of-visual-effects-of-fs-lasik-for-myopia-centered-on-the-coaxially-sighted-corneal-light-reflex-or-the-line-of-sight
#6
Jing Zhang, Shi-Sheng Zhang, Qin Yu, Jing-Cai Lian
AIM: To compare visual quality after femtosecond laser in situ keratomileusis (FS-LASIK), between the coaxially sighted corneal light reflex (CSCLR) group and conventional ablation line of sight (LOS) group. METHODS: In total, 243 eyes (122 patients) were treated with centration on the CSCLR (visual axis) and 238 eyes (119 patients) treated with centration on the pupil center (LOS). Postoperative outcomes [uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA)], safety index, efficacy index, refractive outcome, ablation center distance from the visual axis, corneal high-order aberrations, subjective discomfort glare and shadowing incidence rate, and contrast sensitivity at 1, 3, and 6mo were measured and compared...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28486722/lasik-for-the-correction-of-high-hyperopic-astigmatism-with-epithelial-thickness-monitoring
#7
Dan Z Reinstein, Glenn I Carp, Timothy J Archer, Tim Buick, Marine Gobbe, Elizabeth L Rowe, Mario Jukic, Emma Brandon, Johnny Moore, Tara Moore
PURPOSE: To evaluate outcomes of high hyperopic LASIK using the MEL 80 excimer laser (Carl Zeiss Meditec, Jena, Germany). METHODS: Retrospective analysis of 830 consecutive high hyperopic LASIK procedures using the MEL 80 excimer laser and either the VisuMax femtosecond laser (Carl Zeiss Meditec) or zero compression Hansatome microkeratome (Bausch & Lomb, Rochester, NY). Inclusion criteria were attempted hyperopic correction of +4.00 diopters [D] or higher in one axis and corrected distance visual acuity (CDVA) of 20/20 or better...
May 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28461870/assessment-of-refractive-outcome-of-femtosecond-assisted-lasik-for-hyperopia-correction
#8
Mohamed Tarek El-Naggar, Dikran Gilbert Hovaghimian
INTRODUCTION: Laser vision correction for hyperopia is challenging. The purpose of the study was to assess the refractive outcomes of femtosecond-assisted laser in situ keratomileusis (LASIK) for hyperopic correction using wavefront-optimized ablation profiles. METHODS: This retrospective case series study included 20 Egyptian patients (40 eyes) with hyperopia or hyperopic astigmatism with a mean manifest refraction spherical equivalent (MRSE) of +2.55D±1.17 (range from +1...
March 2017: Electronic Physician
https://www.readbyqxmd.com/read/28420926/femto-lasik-the-recent-innovation-in-laser-assisted-refractive-surgery
#9
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/28407165/comparison-of-corneal-epithelial-remodeling-after-femtosecond-laser-assisted-lasik-and-small-incision-lenticule-extraction-smile
#10
Ik-Hee Ryu, Bong Jun Kim, Jong-Hyuck Lee, Sun Woong Kim
PURPOSE: To comparatively investigate changes in epithelial thickness between myopic femtosecond laser-assisted LASIK (FS-LASIK) and small incision lenticule extraction (SMILE). METHODS: This study compared the topographic epithelial thickness changes in 175 myopic eyes undergoing FS-LASIK (62 eyes) or SMILE (113 eyes). Epithelial thickness was obtained using spectral-domain optical coherence tomography before surgery and 1 and 3 months after surgery. Topographic epithelial thickness obtained by automatic algorithm and thickness variability (standard deviation over 17 imaged areas) was compared between two groups...
April 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28396803/corneal-clarity-and-visual-outcomes-after-small-incision-lenticule-extraction-and-comparison-to-femtosecond-laser-assisted-in-situ-keratomileusis
#11
Apostolos Lazaridis, Konstantinos Droutsas, Walter Sekundo, Michael Petrak, Stephan Schulze
Purpose. To evaluate corneal clarity and visual outcomes after small-incision lenticule extraction (SMILE) and compare them to femtosecond laser-assisted in situ keratomileusis (FS-LASIK). Materials and Methods. Fifty-eight myopic eyes of 33 patients who underwent SMILE were compared to 58 eyes of 33 patients treated with FS-LASIK. All procedures were performed using VisuMax® femtosecond laser and MEL 80® excimer laser (Carl Zeiss Meditec AG, Germany). Pentacam™ (Oculus, Germany) was used for pre- and 3-month postoperative corneal densitometry (CD) analysis...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28388896/comparison-of-ocular-higher-order-aberrations-after-smile-and-wavefront-guided-femtosecond-lasik-for-myopia
#12
Xiaoqin Chen, Yan Wang, Jiamei Zhang, Shun-Nan Yang, Xiaojing Li, Lin Zhang
BACKGROUND: To compare changes in higher-order aberrations (HOAs) following small incision lenticule extraction (SMILE) and wavefront-guided femtosecond laser-assisted in situ keratomileusis (WFG FS-LASIK), and to investigate correlations between preoperative spherical equivalence (SE) and components of HOAs affecting visual quality. METHODS: Sixty-five myopic eyes from 38 patients were enrolled in the study retrospectively, either having undergone SMILE or WFG FS-LASIK...
April 7, 2017: BMC Ophthalmology
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
#13
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/28366364/efficacy-and-perioperative-timing-of-bromfenac-in-the-management-of-ocular-discomfort-after-femtosecond-laser-assisted-laser%C3%A2-in-situ-keratomileusis
#14
Nathan A Cleaveland, Derek W De Mann, Neil E Carlson, Michael L Keil
PURPOSE: To evaluate the safety, efficacy, and appropriate perioperative timing of the use of topical bromfenac ophthalmic solution 0.07% after femtosecond laser-assisted laser in situ keratomileusis (LASIK). SETTING: Keil LASIK Vision Center, Grand Rapids, Michigan, USA. DESIGN: Prospective case series. METHODS: Ocular discomfort was assessed 1, 2, and 5 hours postoperatively and the following morning using the Ocular Comfort Grading Assessment in patients treated with topical bromfenac 0...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28366362/femtosecond-laser-assisted-laser-in-situ-keratomileusis-versus-photorefractive-keratectomy-effect-on-ocular-surface-condition
#15
Paola Sauvageot, Gemma Julio, Juan Alvarez de Toledo, Victor Charoenrook, Rafael I Barraquer
PURPOSE: To compare ocular surface characteristics in eyes after femtosecond laser-assisted laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK). SETTING: Centro de Oftalmologia Barraquer, Barcelona, Spain. DESIGN: Prospective comparative observational study. METHODS: Patients with myopia who had femtosecond laser-assisted LASIK or PRK were included. Tear osmolarity, the Ocular Surface Disease Index questionnaire, Schirmer I, corneal sensitivity, tear breakup time (TBUT), and corneal fluorescein staining were evaluated preoperatively and 3, 6, and 12 months postoperatively...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28359626/effects-of-femtosecond-and-excimer-lasers-on-implanted-kamra-corneal-inlay-in-animal-models
#16
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/28264132/influences-of-flap-shape-and-hinge-angle-on-opaque-bubble-layer-formation-in-femtosecond-laser-assisted-lasik-surgery
#17
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/28264128/small-incision-lenticule-extraction-smile-for-hyperopia-optical-zone-centration
#18
Dan Z Reinstein, Kishore R Pradhan, Glenn I Carp, Timothy J Archer, Marine Gobbe, Walter Sekundo, Raynan Khan, Kim Citron, Purushottam Dhungana
PURPOSE: To evaluate optical zone centration of hyperopic small incision lenticule extraction (SMILE). METHODS: This prospective study of 60 consecutive hyperopic SMILE procedures used the VisuMax femtosecond laser and matched LASIK procedures with the VisuMax and MEL 80 excimer lasers (Carl Zeiss Meditec AG, Jena, Germany). Inclusion criteria were maximum attempted hyperopic meridian of between +1.00 and +7.00 diopters (D) and astigmatism up to 6.00 D. For SMILE, the optical zone was between 6...
March 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
#19
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
#20
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
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