Advanced Surface Ablation With a New Software for the Reduction of Ablation Irregularities.

Published on Feb 1, 2017in Journal of Refractive Surgery2.711
· DOI :10.3928/1081597X-20161122-01
Paolo Vinciguerra28
Estimated H-index: 28
Fabrizio I. Camesasca18
Estimated H-index: 18
+ 4 AuthorsJ. Bradley Randleman8
Estimated H-index: 8
(SC: University of Southern California)
PURPOSE: To compare visual outcomes and postoperative aberrations after surface ablation performed with a 750-Hz versus a 1,050-Hz excimer laser coupled with an ablation software designed to reduce corneal surface irregularity. METHODS: Retrospective comparative trial of myopic eyes that had refractive surgery consecutively treated with transepithelial advanced surface ablation with a 750-Hz excimer laser (750 group) versus a 1,050-Hz excimer laser coupled with the Smart Pulse Technology ablation software (SPT group). The SPT algorithm is a laser pulse technology software aimed at reducing surface irregularity of the stromal bed at the end of treatment. The authors evaluated the effect of this smoothing on final visual acuity. Patients were observed for 6 months. RESULTS: A total of 139 eyes in the 750 group and 40 eyes in the SPT group were evaluated. Epidemiological and preoperative refractive data of the two groups were comparable. Uncorrected distance visual acuity improved with time and was significantly better in the SPT group (-0.04 ± 0.61 logMAR for the SPT group vs 0.02 ± 0.78 logMAR for the 750 group) (P < .001). At 6 months, 55% versus 21% achieved 20/16 or better (P = .005) and 90% versus 65% achieved 20/20 or better (P = .019) visual acuity in the SPT and 750 groups, respectively. Corrected distance visual acuity improved with time and appeared to be influenced by group (P = .054), with better results in the SPT group. Coma and trefoil improved significantly with time in a similar manner in both groups. CONCLUSIONS: Surface ablation with the 1,050-Hz excimer laser and SPT software, aimed at reducing the final superficial stromal irregularity, led to improvement of 6-month uncorrected visual acuity. [J Refract Surg. 2017;33(2):89-95.].
📖 Papers frequently viewed together
12 Citations
#1Yong Woo Lee (SKKU: Sungkyunkwan University)H-Index: 2
#2Hyo Jung Gye (SKKU: Sungkyunkwan University)H-Index: 2
Last. Chul Young Choi (SKKU: Sungkyunkwan University)H-Index: 16
view all 3 authors...
AbstractPurpose: To illustrate surgical outcomes of subepithelial irregularities that were identified incidentally during laser refractive surgery.Materials and Methods: The study group consisted of 406 patients who underwent 787 surface ablation refractive surgeries. Ophthalmologic evaluations were performed before each procedure and at 1, 3 and 6 months post-operatively. Subepithelial irregularities were evaluated by analyzing still photographs captured from video recordings. Sizes and locatio...
1 CitationsSource
14 CitationsSource
#1Lingmin He (Stanford University)H-Index: 14
#2Edward E. Manche (Stanford University)H-Index: 28
Importance Wavefront-guided (WFG) and wavefront-optimized (WFO) platforms for refractive surgery are designed for improved visual outcomes. It is unclear which treatment profile is superior for patients undergoing photorefractive keratectomy (PRK). Objective To compare the safety, efficacy, predictability, stability, and higher-order aberrations in eyes undergoing WFG and WFO PRK. Design, Setting, and Participants A prospective, randomized, fellow-eye–controlled clinical trial was conducted at t...
22 CitationsSource
PURPOSE: To compare the effect of wavefront-guided (WFG) and wavefront-optimized (WFO) photorefractive keratectomy (PRK) on patient perceived quality of vision. METHODS: Seventy-one patients (142 eyes) were enrolled in this prospective, randomized, fellow eye controlled study. One eye was randomized to undergo WFG PRK treatment by the AMO Visx CustomVue S4 IR excimer laser system (Abbott Medical Optics, Inc., Santa Clara, CA) and the fellow eye received WFO PRK treatment by the Alcon Allegretto ...
23 CitationsSource
#1Yohko Murakami (Stanford University)H-Index: 10
#2Edward E. Manche (Stanford University)H-Index: 28
Purpose We sought to prospectively compare postoperative symptoms of dry eye, visual fluctuations, and foreign body sensation in patients undergoing LASIK and photorefractive keratectomy (PRK). Design Randomized clinical trial. Participants Sixty-eight eyes of 34 patients were treated with wavefront-guided LASIK and PRK. Methods One eye was treated with LASIK and the fellow eye was treated with PRK. Eyes were randomized by ocular dominance. Patients completed a questionnaire preoperatively and a...
61 CitationsSource
#1Sean McCaffertyH-Index: 7
#2Jim SchwiegerlingH-Index: 29
Last. Eniko T. Enikov (UA: University of Arizona)H-Index: 14
view all 3 authors...
PURPOSE: To examine the interaction between the excimer laser and residual tissue. METHODS: Ten cadaveric porcine eyes with exposed corneal stroma and plastic test spheres underwent uniform 6-mm ablation with a scanning excimer laser. Corneal profilometry of the central 3 mm was measured with submicrometer resolution optical interferometry, before and after uniform excimer ablation. Eleven surface-marked eyes were photomicrographed before and after excimer ablation. Images were superimposed, and...
10 CitationsSource
#1Stephen G. Slade (Vision Institute)H-Index: 1
#2Daniel S. DurrieH-Index: 33
Last. Perry S Binder (Vision Institute)H-Index: 13
view all 3 authors...
Purpose To determine the differences in the visual results, pain response, biomechanical effect, quality of vision, and higher-order aberrations, among other parameters, in eyes undergoing either photorefractive keratectomy (PRK) or thin-flap LASIK/sub-Bowman keratomileusis (SBK; intended flap thickness of ±100 μm and 8.5-mm diameter) at 1, 3, and 6 months after surgery. Design A contralateral eye pilot study. Participants Fifty patients (100 eyes) were enrolled at 2 sites. Methods The mean preo...
66 CitationsSource
#1Paolo VinciguerraH-Index: 28
#2Elena AlbèH-Index: 13
Last. Daniel EpsteinH-Index: 18
view all 5 authors...
PURPOSE: To compare the long-term refractive outcomes and changes in higher order wavefront aberrations in patients undergoing photorefractive keratectomy (PRK) with topography-guided (CATz) or wavefront-guided (OPDCAT) ablation algorithm using the NIDEK Advanced Vision Excimer Laser System (NAVEX).
16 CitationsSource
#1J. Bradley Randleman (Emory University)H-Index: 33
#2Evan S. Loft (Emory University)H-Index: 3
Last. R. Doyle Stulting (Emory University)H-Index: 60
view all 5 authors...
Purpose To compare early visual outcomes after wavefront-optimized advanced surface ablation (ASA) with those after wavefront-optimized LASIK. Design Retrospective comparative series. Participants One hundred thirty-six eyes undergoing ASA and 136 preoperative refraction–matched eyes undergoing LASIK from June 2004 through October 2005. Methods Database review of preoperative characteristics, including patient age, gender, refraction, and central corneal pachymetry; perioperative information, in...
41 CitationsSource
#1Marcelo V. Netto (Cleveland Clinic)H-Index: 25
#2Rajiv R. Mohan (Cleveland Clinic)H-Index: 43
Last. Steven E. Wilson (Cleveland Clinic)H-Index: 83
view all 6 authors...
In conclusion, these results demonstrated a relationship between the level of corneal haze formation after PRK and the level of stromal surface irregularity. PTK-smoothing with methylcellulose was an effective method to reduce stromal surface irregularity and decreased both haze and associated myofibroblast density. We hypothesize that stromal surface irregularity after PRK for high myopia results in defective basement membrane regeneration and increased epithelium-derived TGFβ signalling to the...
200 CitationsSource
Cited By14
#1Diego de OrtuetaH-Index: 14
#2Dennis von RüdenH-Index: 2
Last. Samuel Arba-MosqueraH-Index: 17
view all 3 authors...
Is it possible to obtain good results in myopia of 2 or fewer diopters (D) with transepithelial photorefractive keratectomy (TransPRK) changing the optical zone and epithelium thickness? We retrospectively analyzed two groups of 296 eyes with a minimum follow-up of 4 months. Group A had 2 or less D, treated with an optical zone (OZ) 0.2 mm bigger than recommended, and a central epithelium thickness of 60 microns, and group B had 2 D to 5 D, with the recommended optical zone, and a 55-micron epit...
#1Riccardo Vinciguerra (University of Liverpool)H-Index: 20
#2Alfredo Borgia (Humanitas University)H-Index: 3
Last. Paolo Vinciguerra (Humanitas University)H-Index: 28
view all 4 authors...
Abstract Excimer lasers induces significant changes to corneal structure and corneal biomechanics. The aim of this paper is to describe all laser-tissue interactions which are relevant for clinical practice, particularly, we will focus on laser ablations profiles, causes of regression and haze and prevention of those. At last the manuscript will describe the impact on corneal biomechanics of different Laser Vision Corrections techniques.
#1Hesham Mohamed Gharieb (Ain Shams University)H-Index: 2
#2Mo'mena Ahmad A Awad-Allah (Ain Shams University)
Last. Ihab Saad Othman (Cairo University)H-Index: 4
view all 4 authors...
Purpose to compare single-step transepithelial PRK (TPRK) to conventional alcohol assisted epithelial removal then PRK (AAPRK) regarding pain, epithelial healing, visual acuity, corneal haze measured subjectively and objectively, higher order aberrations changes, contrast sensitivity and vector analysis of astigmatic correction with one year follow-up. Patients and methods a prospective double-blind randomized study of 29 subjects (58 eyes) who underwent myopic aberration-free laser correction b...
Purpose: We evaluated the refractive visual outcomes and efficacy of Transepithelial Photorefractive Keratectomy (TransPRK) using Smart Pulse Technology with static and dynamic cyclotorsion and the AMARIS 1050 Hz RS laser platform from Schwind in the eyes after a refractive lens exchange. Setting/Venue: Aurelios Augenlaserzentrum, Recklinghausen. Methods: We retrospectively evaluated the data of 552 consecutive eyes treated with refractive lens exchange between 2016 and 2019. A total of 47 eyes ...
1 CitationsSource
#2Elvin Yildiz (UHSA: University of Health Sciences Antigua)
Last. Ece Turan VuralH-Index: 5
view all 3 authors...
Purpose The aim of this study was to evaluate visual quality after high-frequency transepithelial photorefractive keratectomy (t-PRK) by assessing the relationship between the operational parameters and the first-year postoperative corneal higher-order aberrations (HOAs). Methods This was a retrospective study of low-to-moderate myopic eyes treated with t-PRK. The files of 46 low-to-moderate myopic patients (90 eyes; myopia up to -5D) were included in the study. Eyes having a cylindrical refract...
#1Rohit ShettyH-Index: 30
#2Raghav NarasimhanH-Index: 2
Last. Abhijit Sinha RoyH-Index: 23
view all 7 authors...
PURPOSE To analyze corneal and epithelial remodeling differences between SmartSurfACE reverse transepithelial PRK (SCHWIND eye-tech-solutions) and Streamlight (Alcon Laboratories, Inc) transepithelial PRK procedure using optical coherence tomography (OCT) and artificial intelligence (AI). METHODS This was a prospective, interventional, and longitudinal study. A contralateral eye study was conducted in which one eye was assigned to the SmartSurfACE group and the fellow eye was assigned to the Str...
1 CitationsSource
#1Jiafan Zhang (Academy of Medical Sciences, United Kingdom)
#2Qingqing Feng (Qingdao University)
Last. Keli Long (Academy of Medical Sciences, United Kingdom)
view all 5 authors...
BACKGROUND To compare the clinical outcomes of transepithelial photorefractive keratectomy (TPRK) with femtosecond laser-assisted in situ keratomileusis (FS-LASIK) for correction of high myopia. METHODS In this prospective, non-randomised, cohort study, 85 eyes of 46 patients treated with TPRK and 80 eyes of 42 patients treated with FS-LASIK were included. All eyes were highly myopic (spherical equivalent refraction <- 6.00 diopters). Both TPRK and FS-LASIK were performed by Schwind Amaris 750S ...
#2Virgilio GalvisH-Index: 12
view all 7 authors...
Objective: To compare late mid-term results of two different surgical approaches of surface excimer laser ablation for myopic and astigmatic errors in contralateral eyes of the same patients. Methods: Prospective cohort study. A photorefractive keratectomy technique was performed on the right eye and single-step transepithelial photorefractive keratectomy on the left eye of the same patient, in 2012. Postoperative uncorrected and corrected visual acuities, manifest refraction, contrast sensitivi...
#1Wolfgang J. Mayer (LMU: Ludwig Maximilian University of Munich)H-Index: 21
#2Mehdi Shajari (LMU: Ludwig Maximilian University of Munich)H-Index: 4
Last. Thomas Kohnen (Goethe University Frankfurt)H-Index: 61
view all 7 authors...
Die vorliegende Ubersichtsarbeit gibt einen Einblick in refraktive Oberflachenverfahren, insbesondere der PRK und trans-PRK. Aktuelle Aspekte werden dargestellt und Nebenwirkungen sowie Risiken diskutiert.
#1David T.C. LinH-Index: 10
#2Simon P. HollandH-Index: 18
Last. Samuel Arba-Mosquera (Schwind eye tech solutions)H-Index: 17
view all 5 authors...
Abstract Purpose To investigate immediate and short-term visual recovery in a large cohort of 2093 myopic eyes (with or without astigmatism) treated with SmartSurfACE procedure, a combination of Transepithelial Photo Refractive Keratectomy (PRK) and Smart Pulse Technology (SPT, SCHWIND eye-tech-solutions GmbH, Kleinostheim, Germany). Methods In this retrospective case series, post-operative outcomes were evaluated immediately after the surgery (Day 0), at day 1 and 3 months postoperatively, afte...
6 CitationsSource