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Small lenticule extraction laser

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https://www.readbyqxmd.com/read/28421140/comparison-of-corneal-power-and-astigmatism-between-simulated-keratometry-true-net-power-and-total-corneal-refractive-power-before-and-after-smile-surgery
#1
Yishan Qian, Yan Liu, Xingtao Zhou, Rajeev Krishnan Naidu
Purpose. To compare the mean corneal power (Km) and total astigmatism (Ka) estimated by three methods: simulated keratometry (simK), true net power (TNP), and total corneal refractive power (TCRP) before and after femtosecond laser small incision lenticule extraction (SMILE) surgery. Methods. A retrospective, cross-sectional study. SimK, TNP, and TCRP from a Scheimpflug analyzer were obtained from 144 patients before and 6 months after SMILE surgery. Km and Ka were recorded as the mean of individual paracentral rings of 1...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28407165/comparison-of-corneal-epithelial-remodeling-after-femtosecond-laser-assisted-lasik-and-small-incision-lenticule-extraction-smile
#2
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/28407161/preliminary-evidence-of-successful-near-vision-enhancement-with-a-new-technique-presbyopic-allogenic-refractive-lenticule-pearl-corneal-inlay-using-a-smile-lenticule
#3
Soosan Jacob, Dhivya Ashok Kumar, Amar Agarwal, Athiya Agarwal, Ramalingam Aravind, A I Saijimol
PURPOSE: To describe a new technique (PrEsbyopic Allogenic Refractive Lenticule [PEARL] inlay) using an allogenic corneal inlay prepared from a small incision lenticule extraction (SMILE) lenticule. METHODS: A SMILE lenticule of specified thickness (mean: 61.5 ± 3.32 µm) was trephined at the center to 1-mm diameter and implanted in the cornea on the coaxially sighted light reflex under a femtosecond laser-created cap of 120 µm in the nondominant eye of presbyopic patients...
April 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28396804/impact-of-treatment-decentration-on-higher-order-aberrations-after-smile
#4
Ying Yu, Wenwen Zhang, Xinliang Cheng, Jianru Cai, Hui Chen
Purpose. To evaluate decentration following femtosecond laser small incision lenticule extraction (SMILE) and sub-Bowman keratomileusis (SBK) and its impact on higher-order aberrations (HOAs). Methods. Prospective, nonrandom, and comparison study. There were 96 eyes of 52 patients who received SMILE and 96 eyes of 49 patients who received SBK in this study. Decentration was calculated 6 months after surgery with Pentacam. HOAs and visual acuity after the surgery were examined for patients in both groups before and 6 months after surgery...
2017: Journal of Ophthalmology
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
#5
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
#6
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/28379651/visual-quality-after-femtosecond-laser-small-incision-lenticule-extraction
#7
Huamao Miao, Tian Han, Mi Tian, Xiaoying Wang, Xingtao Zhou
Femtosecond laser small incision lenticule extraction (SMILE) is a newly developed form of "flapless" corneal refractive surgery with all-in-one technology. Femtosecond laser SMILE is increasingly attractive for both doctors and patients because it is minimally invasive and does not require a flap to be lifted during surgery. It exhibits many advantages in terms of morphology, biomechanical effects, corneal wound healing, and nerve rehabilitation. However, visual quality assessment after refractive surgeries is just as important as these advantages and correlates with patient satisfaction...
March 29, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28379648/cap-lenticular-adhesion-during-small-incision-lenticular-extraction-surgery-causative-factors-and-outcomes
#8
Rohit Shetty, Nikhil Negalur, Rushad Shroff, Kalyani Deshpande, Chaitra Jayadev
PURPOSE: To study the factors causing cap lenticular adhesion (CLA), a rare complication of small incision lenticule extraction (SMILE) surgery, and its effect on surgical outcomes. DESIGN: A prospective, observational, cross-sectional study involving 550 eyes of 285 subjects. METHODS: SMILE was performed using the VisuMax femtosecond laser (Carl Zeiss Meditec, Jena, Germany) with a minimum of 3 months follow-up. Preoperative visual quality assessment, measurement of corneal biomechanics, and Bowman membrane imaging were performed...
March 29, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28264135/smile-rescue-delayed-lenticule-removal-in-a-patient-with-high-myopia
#9
Jessica Y Tong, Svetlana Cherepanoff, John J Males
PURPOSE: To report successful stromal lenticule extraction, 18 weeks after an aborted small incision lenticule extraction (SMILE) procedure. METHODS: Case report. RESULTS: SMILE was planned in both eyes in another center to correct high myopia. The right eye was treated uneventfully with immediate lenticule extraction and normal postoperative corneal and topographic appearance. Femtosecond laser treatment was applied to the left eye, but the lenticule could not be removed and the procedure was aborted...
March 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28264134/biomechanical-weakening-of-different-re-treatment-options-after-small-incision-lenticule-extraction-smile
#10
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/28264128/small-incision-lenticule-extraction-smile-for-hyperopia-optical-zone-centration
#11
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/28135749/-limitations-of-smile-small-incision-lenticule-extraction
#12
T Seiler, T Koller, V V Wittwer
Background SMILE is a relatively new technique to correct moderate and high myopia. The limits of SMILE are yet unknown. Methods Literature research using PubMed until October 1, 2016. Results/Discussion Recently presented axial 2D-strain-stress measurements indicate that the biomechanical impairment of the cornea after SMILE and LASIK is comparable. The difference in elastic moduli is statistically not different. The visual rehabilitation after SMILE takes significantly longer (weeks) compared to LASIK (days)...
January 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28135748/-historical-overview-of-the-clinical-development-of-the-small-incision-lenticule-extraction-surgery-smile
#13
M Blum, K S Kunert, W Sekundo
The clinical use of femtosecond lasers has led to significant progress in the quality of refractive surgery. SMILE femtosecond laser surgery (SMILE: Small Incision Lenticule Extraction) permits the first one step intrastromal laser procedure without a flap. This article describes the gradual development of this surgery during the last ten years.
January 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28060071/corneal-lenticule-allotransplantation-after-femtosecond-laser-small-incision-lenticule-extraction-in-rabbits
#14
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
https://www.readbyqxmd.com/read/28058160/long-term-results-of-small-incision-lenticule-extraction-in-high-myopia
#15
Yusuf Yıldırım, Cengiz Alagöz, Abdülvahit Demir, Onur Ölçücü, Mehmet Özveren, Alper Ağca, Engin Bilge Özgürhan, Ahmet Demirok
OBJECTIVES: To evaluate two-year results of small-incision lenticule extraction (SMILE) for correction of high myopia. MATERIALS AND METHODS: Forty-five eyes of 35 patients with mean spherical equivalent (SE) of -7.10±0.95 D who underwent routine SMILE by a single surgeon and were followed for at least 2 years were analyzed by retrospective chart review. SMILE was performed with a Visumax femtosecond laser (Carl Zeiss Meditec, Jena, Germany). Follow-up intervals were at 1, 6, 12, and 24 months after surgery...
October 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/27992482/dry-eye-after-small-incision-lenticule-extraction-smile-versus-femtosecond-laser-assisted-in-situ-keratomileusis-fs-lasik-for-myopia-a-meta-analysis
#16
Zeren Shen, Yanan Zhu, Xiaohui Song, Jie Yan, Ke Yao
PURPOSE: To compare dry eye after small incision lenticule extraction (SMILE) and femtosecond laser-assisted LASIK (FS-LASIK) for correcting myopia. METHODS: CENTRAL, Embase and PubMed were searched in November 2016. All randomized controlled trials (RCTs) and prospective cohorts that compared dry eye after SMILE with FS-LASIK were selected. RESULTS: Five cohorts and one RCT were identified for comparing dry eye after SMILE (291 eyes) and FS-LASIK (277 eyes)...
2016: PloS One
https://www.readbyqxmd.com/read/27957338/comparison-of-the-optical-quality-between-small-incision-lenticule-extraction-and-femtosecond-laser-lasik
#17
Ying Jin, Yan Wang, Lulu Xu, Tong Zuo, Hua Li, Rui Dou, Jiamei Zhang
Purpose. To investigate the visual quality after SMILE and Femto-LASIK. Methods. About 123 eyes from 63 patients were enrolled in this study. The parameters were measured preoperatively and 1 week, 1 month, and 3 months postoperatively using Sirius System. Results. The MTF curve increase slightly from low to high frequency at 3 mm and 6 mm pupil diameter after SMILE surgery (P < 0.05) during the follow-up time comparing with the preoperative values. And the SR has a significant increase at various pupil diameters as well (P < 0...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27936474/-three-years-follow-up-study-after-refractive-small-incision-lenticule-extraction-smile-using-500%C3%A2-khz-femtosecond-laser-in-fast-mode
#18
A Messerschmidt-Roth, W Sekundo, A Lazaridis, S Schulze
Background  The aim of this clinical trial was to check the results of laser built-in settings 3 years after ReLEx SMILE for moderate and high myopia in unselected "real life" patients. Patients and Methods  50 myopic eyes of 27 patients were called in for examination after 3 years. 25 of these eyes with a preoperative myopia under - 6D comprised the "moderate myopia subgroup". All surgeries were performed with the 500 kHz VisuMax® femtosecond laser (Carl Zeiss Meditec AG, Jena) in the "fast mode" setting...
January 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/27930794/using-donor-lenticules-obtained-through-smile-for-an-epikeratophakia-technique-combined-with-phototherapeutic-keratectomy
#19
Jing Zhao, Ling Sun, Yang Shen, Mi Tian, Peijun Yao, Xingtao Zhou
PURPOSE: To investigate the feasibility, safety, and efficacy of using a donor lenticule created during small incision lenticule extraction (SMILE) in an epikeratophakia technique combined with phototherapeutic keratectomy (PTK). METHODS: Six patients with decreased visual acuity due to a recurrence of corneal dystrophy were included in this prospective pilot study. PTK was performed using the MEL 80 excimer laser (Carl Zeiss Meditec, Jena, Germany) followed by the transplantation of donor lenticules onto the recipient eyes...
December 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27916313/influence-of-the-flap-on-outcomes-in-corneal-refractive-surgery-with-femtosecond-laser-smile-vs-flex
#20
J L Alió, M El Bahrawy, A Angelov, D Ortiz, P Yébana
OBJECTIVE: To investigate the influence of creating a flap on the postoperative optical quality of the cornea in terms of predicted corneal curvature and Seidel aberrations after 2 modalities of femtosecond assisted corneal lenticule extraction laser for the correction of myopia and myopic astigmatism: The flapless procedure small incision lenticular extraction (SMILE) and the flap-based femtosecond lenticular extraction (FLEx). METHODS: The study is a prospective consecutive non-randomised comparative interventional case series including 64 eyes with myopic or myopic astigmatism refractive errors...
December 1, 2016: Archivos de la Sociedad Española de Oftalmología
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