523 results match your criteria Astigmatism PRK


Prospective evaluation of a novel silicone corneal shield after PRK: 6-month efficacy, safety, and predictability outcomes.

Clin Ophthalmol 2019 7;13:115-121. Epub 2019 Jan 7.

Byers Eye Institute, Department of Ophthalmology, Stanford University School of Medicine, Palo Alto, CA, USA,

Purpose: The aim of this study was to report the 1-week and 6-month refractive outcomes of eyes treated with a novel silicone corneal shield designed to improve visual recovery after photorefractive keratectomy (PRK).

Patients And Methods: This prospective, observational clinical trial recruited 45 myopic eyes with or without astigmatism at a university eye clinic to undergo wavefront-guided PRK followed by application of an investigational silicone corneal shield that was removed on postoperative day 4. The primary outcome measures were efficacy, predictability, and safety at the 6-month visit. Read More

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https://www.dovepress.com/prospective-evaluation-of-a-novel-
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http://dx.doi.org/10.2147/OPTH.S183120DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6327892PMC
January 2019
6 Reads

Epi-Bowman Blunt Keratectomy Versus Diluted EtOH Epithelial Removal in Myopic Photorefractive Keratectomy: A Prospective Contralateral Eye Study.

Cornea 2019 Jan 9. Epub 2019 Jan 9.

LaserVision Clinical and Research Eye Institute, Athens, Greece.

Purpose: To compare the outcomes and complications of Epi-Bowman blunt keratectomy (EBK) using a blunt epikeratome (Epi-Clear, Orca Surgical, Israel), with alcohol delamination of the corneal epithelium during photorefractive keratectomy (PRK) in contralateral eyes.

Methods: This prospective, randomized contralateral eye study included 44 eyes of 22 patients undergoing PRK for bilateral myopia or myopic astigmatism. In each patient, epithelial delimitation was performed using an Epi-Clear epikeratome EBK (EBK group) on 1 eye and diluted ethanol (EtOH) on the fellow eye (EtOH group). Read More

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http://dx.doi.org/10.1097/ICO.0000000000001863DOI Listing
January 2019
7 Reads

Wavefront-Guided Photorefractive Keratectomy in the Treatment of High Astigmatism Following Keratoplasty.

Cornea 2019 Mar;38(3):285-289

Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada.

Purpose: To report the outcome of wavefront-guided photorefractive keratectomy (WG-PRK) in the treatment of high astigmatism following keratoplasty.

Methods: A retrospective, interventional analysis including patients with high astigmatism following either penetrating keratoplasty or deep anterior lamellar keratoplasty, who underwent WG-PRK.

Results: Thirteen eyes (7 right eyes) of 12 patients (10 male) aged 35. Read More

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http://dx.doi.org/10.1097/ICO.0000000000001830DOI Listing
March 2019
1 Read

Photorefractive keratectomy for correcting residual refractive error following cataract surgery with premium intraocular lens implantation.

Taiwan J Ophthalmol 2018 Jul-Sep;8(3):149-158

Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan.

Purpose: The aim of this study is to evaluate the effectiveness and predictability of photorefractive keratectomy (PRK) for correcting residual refractive error following cataract surgery with premium intraocular lens (IOL) implantation.

Methods: We conducted a retrospective review of the medical records of patients who received PRK for correcting residual hyperopia, myopia, and/or astigmatism due to unsatisfied uncorrected distance visual acuity (UDVA) after cataract extraction with implantation of aspheric, diffractive multifocal, or toric IOL from September 2011 to December 2017. Pre-cataract surgery, pre- and post-PRK data including UDVA, best-corrected distance visual acuity, and refractive status were analyzed. Read More

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http://www.e-tjo.org/text.asp?2018/8/3/149/240734
Publisher Site
http://dx.doi.org/10.4103/tjo.tjo_51_18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6169333PMC
October 2018
5 Reads

Outcomes of Wavefront-Optimized Laser-Assisted Keratomileusis and Photorefractive Keratectomy for correction of Myopia and Myopic Astigmatism over One Year Follow-Up.

Open Ophthalmol J 2018 26;12:256-263. Epub 2018 Sep 26.

Faculty of Medicine and Health Sciences, An-Najah National University Hospital, An-Najah National University, Nablus, Palestine.

Background: Laser corneal refractive surgery suits, technology and nomograms are improving with time. This may improve the refractive and visual outcomes of the patients.

Objectives: To evaluate the safety, efficacy, stability, and predictability of wavefront-optimized photorefractive keratectomy and Laser-assisted keratomileusis in patients with myopia and myopic astigmatism over 1-year using WaveLight EX500 Excimer Laser machine. Read More

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http://benthamopen.com/FULLTEXT/TOOPHTJ-12-256
Publisher Site
http://dx.doi.org/10.2174/1874364101812010256DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6166393PMC
September 2018
11 Reads

Astigmatic outcomes in myopic wavefront-guided laser in situ keratomileusis versus wavefront-guided photorefractive keratectomy using vector analysis.

J Cataract Refract Surg 2018 Nov 7;44(11):1350-1354. Epub 2018 Sep 7.

From the Byers Eye Institute (Lee, Toy, Manche), Stanford University School of Medicine, Palo Alto, and the USC Roski Eye Institute (Toy), University of Southern California, Los Angeles, California, USA. Electronic address:

Purpose: To compare astigmatic outcomes between eyes having wavefront-guided laser in situ keratomileusis (LASIK) and eyes having wavefront-guided photorefractive keratectomy (PRK).

Setting: Byers Eye Institute, Stanford University School of Medicine, Palo Alto, California, USA.

Design: Prospective randomized case series. Read More

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http://dx.doi.org/10.1016/j.jcrs.2018.07.022DOI Listing
November 2018
1 Read

Contrast Sensitivity After Wavefront-Guided and Wavefront-Optimized PRK and LASIK for Myopia and Myopic Astigmatism.

J Refract Surg 2018 Sep;34(9):590-596

Purpose: To compare contrast sensitivity among participants undergoing wavefront-guided or wavefront-optimized photorefractive keratectomy (PRK) or LASIK for the treatment of myopia or myopic astigmatism 12 months after surgery.

Methods: In a prospective, randomized clinical trial, 215 participants with myopia ranging from -0.50 to -7. Read More

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https://www.healio.com/doiresolver?doi=10.3928/1081597X-2018
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http://dx.doi.org/10.3928/1081597X-20180716-01DOI Listing
September 2018
19 Reads

Myopia and myopic astigmatism photorefractive keratectomy: applying an advanced multiple regression-derived nomogram.

Graefes Arch Clin Exp Ophthalmol 2019 Jan 18;257(1):225-232. Epub 2018 Aug 18.

Care-Vision Laser Centers, Tel-Aviv, Israel.

Purpose: To evaluate a multiple regression-derived nomogram for myopia and myopic astigmatism photorefractive keratectomy (PRK).

Methods: Regression modeling derived a formula for spherocylindrical correction in wavefront-optimized PRK (nomogram II). Treatment outcomes between eyes with myopia and myopic astigmatism using the manufacturer's nomogram (nomogram I) in the years 2010-2013 were retrospectively compared with eyes treated using nomogram II in the years 2014-2015. Read More

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http://dx.doi.org/10.1007/s00417-018-4101-yDOI Listing
January 2019
2 Reads

Studying the factors related to refractive error regression after PRK surgery.

BMC Ophthalmol 2018 Aug 14;18(1):198. Epub 2018 Aug 14.

Department of Ophthalmology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.

Backgtound: Photorefractive keratectomy (PRK) is used for a wide range of refractive errors such as low to moderate myopia, hyperopia and astigmatism. While many improvements have been made in laser application and accuracy as well as the modes of corneal flap removal, and although the results are somewhat predictable, regression of refractive errors is still a common complaint among the patients undergoing refractive surgery with Excimer Laser. We aimed to determine related factors of regression following photorefractive keratectomy (PRK) in different types of refractive errors. Read More

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https://bmcophthalmol.biomedcentral.com/articles/10.1186/s12
Publisher Site
http://dx.doi.org/10.1186/s12886-018-0879-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6092795PMC
August 2018
10 Reads

Topography-Guided Custom Photorefractive Keratectomy for Myopia in Primary Eyes With the WaveLight EX500 Platform.

J Refract Surg 2018 Aug;34(8):541-546

Purpose: To evaluate the outcomes after topography-guided ablation treatment (T-CAT) for the correction of myopia and myopic astigmatism with photorefractive keratectomy (PRK).

Methods: This was a retrospective, non-comparative case series study of 25 patients (40 eyes) with low to moderate myopia with or without astigmatism who underwent topography-guided custom PRK with the Wave-Light EX500 excimer laser platform (Alcon Laboratories, Inc., Fort Worth, TX). Read More

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http://dx.doi.org/10.3928/1081597X-20180705-03DOI Listing
August 2018
4 Reads

Clinical Outcomes of Transepithelial Photorefractive Keratectomy According to Epithelial Thickness.

J Refract Surg 2018 Aug;34(8):533-540

Purpose: To investigate the clinical outcomes, vector parameters, and corneal aberrations of corneal wavefront-guided (CWFG) transepithelial photorefractive keratectomy (PRK), according to epithelial thickness.

Methods: This retrospective, comparative case series study included 91 eyes (91 patients) that underwent CWFG transepithelial PRK for myopic astigmatism. Epithelial thickness was less than 50 μm in 48 patients and 60 μm or greater in 43 patients. Read More

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http://dx.doi.org/10.3928/1081597X-20180618-02DOI Listing
August 2018
2 Reads

Visual and Refractive Outcomes After Sub-Bowman Keratomileusis and Transepithelial Photorefractive Keratectomy for Myopia.

Eye Contact Lens 2019 Mar;45(2):132-136

Joint Shantou International Eye Center (R.Z., L.S., J.L., V.J., M.Z.), Shantou, People's Republic of China; Department of Ophthalmology and Visual Sciences (R.Z., L.S., J.L., A.L., V.J., M.Z.), The Chinese University of Hong Kong, Hong Kong, People's Republic of China; and UPMC Eye Center (V.J.), University of Pittsburgh School of Medicine, Pittsburgh, PA.

Purpose: To compare the visual and refractive outcomes of transepithelial photorefractive keratectomy (Trans-PRK) and sub-Bowman femtosecond-assisted laser in situ keratomileusis (SBK).

Setting: University hospital.

Design: Retrospective, comparative study. Read More

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http://Insights.ovid.com/crossref?an=00140068-900000000-9922
Publisher Site
http://dx.doi.org/10.1097/ICL.0000000000000533DOI Listing
March 2019
22 Reads

Visual and keratometric outcomes of keratoconus patients after sequential corneal crosslinking and topography-guided surface ablation: Early United States experience.

J Cataract Refract Surg 2018 Aug 20;44(8):1003-1011. Epub 2018 Jul 20.

From Lindenhurst Eye Physicians and Surgeons (Nattis), Babylon, Ophthalmic Consultants of Long Island (Donnenfeld), Garden City, the Department of Ophthalmology (Rosenberg), New York Medical College, Valhalla, Nassau University Medical Center (Perry), and Ophthalmic Consultants of Long Island (Perry), Rockville Centre, New York, USA.

Purpose: To evaluate a sequential treatment algorithm for visual and keratometric improvement in keratoconus patients after corneal crosslinking (CXL) followed by topography-guided photorefractive keratectomy (PRK).

Setting: Ophthalmic Consultants of Long Island, Garden City, New York, USA.

Design: Retrospective case series. Read More

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http://dx.doi.org/10.1016/j.jcrs.2018.05.020DOI Listing

Transepithelial Photorefractive Keratectomy in Moderate to High Astigmatism With a Non-wavefront-Guided Aberration-Neutral Ablation Profile.

J Refract Surg 2018 Jul;34(7):466-474

Purpose: To evaluate the outcomes of transepithelial photorefractive keratectomy (PRK) in moderate to high astigmatism with a non-wavefront-guided aberration-neutral ablation profile using SmartPulse allocation.

Methods: In this retrospective study, myopic patients with a preoperative cylinder of 2.00 diopters (D) or greater were analyzed at 3 months of follow-up. Read More

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http://dx.doi.org/10.3928/1081597X-20180402-04DOI Listing
July 2018
3 Reads

Comparison between Wavefront-optimized and corneal Wavefront-guided Transepithelial photorefractive keratectomy in moderate to high astigmatism.

BMC Ophthalmol 2018 Jun 26;18(1):154. Epub 2018 Jun 26.

The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemungu, Seoul, 03722, South Korea.

Background: To compare the clinical outcomes of wavefront-optimized (WFO) transepithelial photorefractive keratectomy (trans-PRK) and corneal wavefront-guided (CWFG) trans-PRK for myopic eyes with moderate to high astigmatism.

Methods: One hundred ninety-six eyes (196 patients) with moderate to high astigmatism (≥ 1.75 D) treated with WFO or CWFG trans-PRK (101 and 95 eyes, respectively) were retrospectively registered. Read More

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http://dx.doi.org/10.1186/s12886-018-0827-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6020237PMC
June 2018
12 Reads

Outcomes of Laser In Situ Keratomileusis and Photorefractive Keratectomy in Patients Taking Isotretinoin.

Am J Ophthalmol 2018 Aug 1;192:98-103. Epub 2018 Jun 1.

Department of Research and Development, Clínica Baviera, Valencia, Spain.

Purpose: To determine the functional outcomes of laser in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK) in patients taking isotretinoin, which is contraindicated for these procedures.

Design: Multicenter, retrospective, interventional case series.

Methods: All patients taking isotretinoin who underwent LASIK or PRK from January 2003 to September 2017 were included (Group 1). Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00029394183021
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http://dx.doi.org/10.1016/j.ajo.2018.05.009DOI Listing
August 2018
15 Reads
3.871 Impact Factor

Comparative analysis of safety and efficacy of photorefractive keratectomy versus photorefractive keratectomy combined with crosslinking.

Clin Ophthalmol 2018 30;12:783-790. Epub 2018 Apr 30.

Refractive Services, The Eye Foundation, Coimbatore, India.

Purpose: To assess the safety, efficacy, and refractive predictability of half-fluence accelerated corneal collagen crosslinking (CXL) applied concurrently with photorefractive keratectomy (PRK), and compare the results to standard PRK.

Setting: Refractive Services, The Eye Foundation, Coimbatore, India.

Design: Interventional comparative case series. Read More

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https://www.dovepress.com/comparative-analysis-of-safety-and
Publisher Site
http://dx.doi.org/10.2147/OPTH.S156500DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5933339PMC
April 2018
7 Reads

Photorefractive keratectomy after cataract surgery in uncommon cases: long-term results.

Int J Ophthalmol 2018 18;11(4):612-615. Epub 2018 Apr 18.

Department of Surgery, Ophthalmology Clinic, University Hospital of Messina, Messina 98124, Italy.

Aim: To evaluate the efficacy and safety of the excimer laser correction of the residual refractive errors after cataract extraction with intraocular lens (IOL) implantation in uncommon cases.

Methods: Totally 24 patients with high residual refractive error after cataract surgery with IOL implantation were examined. Twenty-two patients had a history of phacoemulsification and IOL implantation, and two had extra-capsular cataract extraction with IOL implantation. Read More

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http://dx.doi.org/10.18240/ijo.2018.04.12DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5902365PMC
April 2018
2 Reads

Mechanisms of Optical Regression Following Corneal Laser Refractive Surgery: Epithelial and Stromal Responses.

Med Hypothesis Discov Innov Ophthalmol 2018 ;7(1):1-9

HDR Research Center, Hoopes Vision, 11820 S. State Street Suite #200, Draper, UT 84020, United States.

Laser vision correction is a safe and effective method of reducing spectacle dependence. Photorefractive Keratectomy (PRK), Laser In Situ Keratomileusis (LASIK), and Small-Incision Lenticule Extraction (SMILE) can accurately correct myopia, hyperopia, and astigmatism. Although these procedures are nearing optimization in terms of their ability to produce a desired refractive target, the long term cellular responses of the cornea to these procedures can cause patients to regress from the their ideal postoperative refraction. Read More

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https://www.researchgate.net/publication/324504731_Mechanism
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5887600PMC
January 2018
15 Reads

Topography-guided transepithelial photorefractive keratectomy to correct irregular refractive errors after radial keratotomy.

J Cataract Refract Surg 2018 Mar 30;44(3):274-279. Epub 2018 Mar 30.

From the Department of Ophthalmology (Ghoreishi, Peyman, Koosha, Golabchi, Pourazizi), Isfahan University of Medical Sciences and the Department of Research and Development (Ghoreishi), Parsian Clinic of Ophthalmology, Isfahan, Iran.

Purpose: To evaluate the efficacy and safety of topography-guided transepithelial photorefractive keratectomy (PRK) in a group of patients with post-radial keratotomy (RK) showing irregular corneas.

Setting: Feiz University Hospital, Isfahan, Iran.

Design: Prospective case series. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S08863350183013
Publisher Site
http://dx.doi.org/10.1016/j.jcrs.2017.12.015DOI Listing
March 2018
9 Reads

Calculation of Unknown Preoperative K Readings in Postrefractive Surgery Patients.

J Ophthalmol 2018 11;2018:3120941. Epub 2018 Feb 11.

Department of Ophthalmology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.

Purpose: To determine the unknown preoperative K readings (Kpre) to be used in history-based methods, for intraocular lens (IOL) power calculation in patients who have undergone myopic photorefractive keratectomy (PRK).

Methods: A regression formula generated from the left eyes of 174 patients who had undergone PRK for myopia or for myopic astigmatism was compared with other methods in 168 right eyes. The Pearson index and paired -test were utilized for statistical analysis. Read More

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http://dx.doi.org/10.1155/2018/3120941DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5828239PMC
February 2018
5 Reads

Two-year results of femtosecond assisted LASIK versus PRK for different severity of astigmatism.

J Curr Ophthalmol 2018 Mar 9;30(1):48-53. Epub 2017 Oct 9.

Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

Purpose: To compare two-year results of femtosecond laser assisted LASIK (femto-LASIK) and photorefractive keratectomy (PRK) in terms of astigmatism correction in patients with less than 2.0 diopters (D) of spherical error and more than 2.0 D of cylinder error. Read More

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http://dx.doi.org/10.1016/j.joco.2017.09.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5859517PMC

Keratectasia after laser-assisted subepithelial keratectomy for myopia: A case report.

Medicine (Baltimore) 2018 Mar;97(12):e0094

Rationale: Recently, some ophthalmologists performed PRK or LASEK surgeries in FFKC suspicious patients, which is supposed to prevent FFKC evolvement via fibrotic scar formation. Our report indicates that keratectasia can occur after LASEK in FFKC suspicious patients, highlighting the importance of stricter regulation of patient recruitment before the procedure and postoperative follow-up.

Patient Concerns: This is a report of a 25-year-old man with poor corrected distance visual acuity (CDVA) 6 years after LASEK. Read More

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http://dx.doi.org/10.1097/MD.0000000000010094DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5895349PMC
March 2018
5 Reads

Z-LASIK and Trans-PRK for correction of high-grade myopia: safety, efficacy, predictability and clinical outcomes.

Int Ophthalmol 2018 Mar 12. Epub 2018 Mar 12.

Assuta Optic, Assuta Medical Center, Tel Aviv, Israel.

Purpose: The aim of the study was to examine the outcomes of transepithelial photorefractive keratectomy (Trans-PRK) and Femtosecond Laser-assisted in situ keratomileusis (Z-LASIK) for the correction of high myopia.

Methods: A retrospective cohort study design was used. The study group included 792 eyes with high-grade myopia (- 6. Read More

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http://dx.doi.org/10.1007/s10792-018-0868-4DOI Listing
March 2018
8 Reads

Nepafenac Ophthalmic Suspension 0.3% for the Management of Ocular Pain After Photorefractive Keratectomy.

J Refract Surg 2018 Mar;34(3):171-176

Purpose: To investigate the effect of nepafenac 0.3% in a once daily dosage regarding pain and healing after photorefractive keratectomy (PRK).

Methods: This was a prospective, comparative, contralateral randomized study of 35 patients undergoing PRK for the correction of low to moderate myopia and myopic astigmatism. Read More

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http://www.healio.com/doiresolver?doi=10.3928/1081597X-20180
Publisher Site
http://dx.doi.org/10.3928/1081597X-20180123-03DOI Listing
March 2018
15 Reads

Clinical Outcomes of SMILE With a Triple Centration Technique and Corneal Wavefront-Guided Transepithelial PRK in High Astigmatism.

J Refract Surg 2018 Mar;34(3):156-163

Purpose: To comparatively investigate the clinical outcomes, vector parameters, and corneal aberrations of small incision lenticule extraction (SMILE) with a triple centration technique and corneal wavefront-guided transepithelial photorefractive keratectomy (PRK) for the correction of high astigmatism.

Methods: This retrospective, comparative case series study included 89 eyes (89 patients) that received treatment for myopia with high astigmatism (≥ 2.50 diopters) using SMILE with a triple centration technique (SMILE group; 45 eyes) and corneal wavefront-guided transepithelial PRK (transepithelial PRK group; 44 eyes). Read More

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http://www.healio.com/doiresolver?doi=10.3928/1081597X-20180
Publisher Site
http://dx.doi.org/10.3928/1081597X-20180104-03DOI Listing
March 2018
10 Reads

Factors Influencing Cyclotorsion During Photorefractive Keratectomy.

J Refract Surg 2018 Feb;34(2):106-112

Purpose: To determine predictive factors for intra-operative cyclotorsion in photorefractive keratectomy (PRK).

Methods: A retrospective statistical analysis of medical records pertaining to 3,996 eyes undergoing PRK was conducted. Outcome measures of this study were the likely existence of statistically significant relations between diverse and potentially influential factors and the occurrence of intraoperative cyclotorsion. Read More

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http://dx.doi.org/10.3928/1081597X-20171128-02DOI Listing
February 2018
3 Reads

Mitomycin C 0.02 and 0.002% efficacy in preventing haze after photorefractive keratectomy.

Int Ophthalmol 2019 Feb 16;39(2):341-345. Epub 2018 Jan 16.

Faculdade de Ciências Médicas de Minas Gerais (FCMMG), Belo Horizonte, MG, Brazil.

Purpose: To compare MMC 0.002% efficacy in preventing haze after PRK in relation to MMC 0.02%. Read More

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http://dx.doi.org/10.1007/s10792-017-0817-7DOI Listing
February 2019
2 Reads

Accommodative Esotropia Treatment Plan Utilizing Simultaneous Strabismus Surgery and Photorefractive Keratectomy.

Am J Ophthalmol 2018 03 12;187:125-129. Epub 2018 Jan 12.

Department of Ophthalmology, Ochsner Clinic Foundation, New Orleans, Louisiana.

Purpose: Accommodative esotropia is a common cause of acquired esotropia. Pathogenesis varies among patients but usually includes excessive hyperopia and a high accommodative convergence/accommodation ratio or tight medial recti. The present study reviews an individualized treatment plan combining photorefractive keratectomy (PRK) and strabismus surgery to correct these problems. Read More

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http://dx.doi.org/10.1016/j.ajo.2018.01.005DOI Listing
March 2018
2 Reads

Aspheric versus wavefront-guided aspheric photorefractive keratectomy in eyes with significant astigmatism.

J Cataract Refract Surg 2017 Dec;43(12):1534-1540

From the Ophthalmic Research Center and Department of Ophthalmology (Faramarzi, Karimian, Delfazayebaher, Kheiri), Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; John A Moran Eye Center (Moshirfar), Department of Ophthalmology and Visual Sciences, University of Utah, Salt Lake City, Utah, USA.

Purpose: To compare the refractive and higher-order aberrations (HOAs) outcomes after photorefractive keratectomy (PRK) in patients with significant astigmatism using aspheric versus wavefront-guided aspheric profiles.

Setting: Ophthalmic Research Center and Department of Ophthalmology, Shahid Beheshti University of Medical Sciences, Negah Eye Hospital, Tehran, Iran.

Design: Prospective randomized case series. Read More

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http://dx.doi.org/10.1016/j.jcrs.2017.09.022DOI Listing
December 2017
7 Reads

Refractive lenticule extraction small incision lenticule extraction: A new refractive surgery paradigm.

Indian J Ophthalmol 2018 01;66(1):10-19

Department of Phaco-Refractive, Nethradhama Superspeciality Eye Hospital, Bengaluru, Karnataka, India.

Small incision lenticule extraction (SMILE), a variant of refractive lenticule extraction technology is becoming increasingly popular, as a flapless and minimally invasive form of laser vision correction (LVC) for the treatment of myopia and myopic astigmatism. This review aims at summarizing the principles, surgical technique, and clinical outcomes in terms of visual and refractive results, safety, efficacy, postoperative dry eye, aberrations, and biomechanics of SMILE and its comparison with other conventional techniques of LVC, such as laser in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK). Recent advancements in the laser frequency and energy delivery patterns, instrumentation, and surgical techniques have shown significant improvement in the visual recovery and outcomes after SMILE, compared to the initial results published by Sekundo and Shah et al. Read More

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http://dx.doi.org/10.4103/ijo.IJO_761_17DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5778540PMC
January 2018
15 Reads

Visual Outcomes and Aberrometric Changes With Topography-Guided Photorefractive Keratectomy Treatment of Irregular Astigmatism After Penetrating Keratoplasty.

Cornea 2018 Mar;37(3):283-289

Department of Ophthalmology and Visual Sciences, Paulista School of Medicine, Federal University of São Paulo, São Paulo, Brazil.

Purpose: To evaluate the visual acuity and keratometric and aberrometric changes in patients with corneal transplants (PKP), who underwent topography-guided photorefractive keratectomy (TG-PRK) with mitomycin C (MMC).

Methods: In this case study, 15 patients with spherical equivalents ranging from -11.00 to -0. Read More

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http://dx.doi.org/10.1097/ICO.0000000000001474DOI Listing
March 2018
9 Reads

[LenSx® femto-LASIK, FEMTO LDV Z4® femto-LASIK, and PRK : Comparison of refractive results and an analysis of complications].

Ophthalmologe 2018 Nov;115(11):928-940

Charité - Universitätsmedizin Berlin, "corporate member" der Freien Universität Berlin, Humboldt-Universität zu Berlin und Berlin Institute of Health, Augustenburger Platz 1, 13353, Berlin, Deutschland.

Background: The aim of this study is to evaluate three refractive procedures: LenSx® (Alcon, Fort Worth, TX, USA) femto-laser in situ keratomileusis (LASIK), FEMTO LDV Z4® (Ziemer, Port, Switzerland) femto-LASIK, and photorefractive keratectomy (PRK) in terms of refractive outcome, perioperative complications, pain, and patient satisfaction.

Materials And Methods: Data of 168 eyes (myopic n = 84) were included in this retrospective study. Of these, 54 eyes (n = 27, 33. Read More

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http://dx.doi.org/10.1007/s00347-017-0598-4DOI Listing
November 2018
16 Reads

Epithelial Erosions and Refractive Results After Single-Step Transepithelial Photorefractive Keratectomy and Alcohol-Assisted Photorefractive Keratectomy in Myopic Eyes: A Comparative Evaluation Over 12 Months.

Cornea 2018 Jan;37(1):45-52

Department of Ophthalmology, American University of Beirut, Beirut, Lebanon.

Purpose: To evaluate the epithelial erosion incidence and refractive results in myopic eyes undergoing single-step transepithelial photorefractive keratectomy (TransPRK) compared with alcohol-assisted photorefractive keratectomy (PRK).

Methods: This was a retrospective nonrandomized comparative study conducted at the American University of Beirut Medical Center. A total of 189 eyes that had undergone single-step transepithelial PRK (TransPRK) were compared with 189 matched eyes that had undergone alcohol-assisted PRK over a follow-up of 1 year. Read More

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http://dx.doi.org/10.1097/ICO.0000000000001428DOI Listing
January 2018
19 Reads

High-resolution wavefront-guided surface ablation with corneal cross-linking in ectatic corneas: a pilot study.

Clin Ophthalmol 2017 3;11:1777-1783. Epub 2017 Oct 3.

Bogota Laser Ocular Surgery Center, Bogota, Colombia.

Purpose: A preliminary study to evaluate the outcomes of high-resolution wavefront-guided (HRWG) photorefractive keratectomy (PRK) with simultaneous corneal cross-linking (CXL) in ectasia eyes.

Methods: Sixteen eyes of 11 patients (mean age 31.9±9. Read More

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http://dx.doi.org/10.2147/OPTH.S140627DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5633298PMC
October 2017
13 Reads

Visual performance after excimer laser photorefractive keratectomy for high myopia.

Taiwan J Ophthalmol 2017 Apr-Jun;7(2):82-88

Department of Ophthalmology, Changhua Christian Hospital, Changhua, Taiwan.

Purpose: To evaluate the efficacy, safety, predictability, and visual performance of excimer laser photorefractive keratectomy (PRK) for myopia greater than -8 diopters (D).

Methods: Fifty-four patients (104 eyes) with myopia from -8D to -13D and cylinder up to -4D received surface ablation technique with the Allegretto wave version 1009-1 excimer laser to correct their refractive error. The patients were examined on days 1, 3, 7, and 14 and 1, 3, 6, and 12 months postoperatively. Read More

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http://dx.doi.org/10.4103/tjo.tjo_6_17DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5602153PMC
October 2017
17 Reads

Four-Stage Procedure for Keratoconus: ICRS Implantation, Corneal Cross-linking, Toric Phakic Intraocular Lens Implantation, and Topography-Guided Photorefractive Keratectomy.

J Refract Surg 2017 Oct;33(10):683-689

Purpose: To evaluate a four-stage combined treatment for keratoconus including intrastromal corneal ring segment (ICRS) implantation followed by corneal cross-linking (CXL), toric phakic intraocular lens (IOL) implantation, and topography-guided photorefractive keratectomy (TG-PRK).

Methods: In this retrospective interventional case series, 11 eyes of 7 patients with progressive keratoconus were treated with a four-stage procedure including the following: Keraring ICRS (Mediphacos Ltda, Belo Horizonte, Brazil) implantation followed by CXL, phakic IOL implantation, and TG-PRK (minimum 6 months between each stage). Minimum follow-up was 12 months after TG-PRK. Read More

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http://www.healio.com/doiresolver?doi=10.3928/1081597X-20170
Publisher Site
http://dx.doi.org/10.3928/1081597X-20170807-01DOI Listing
October 2017
27 Reads

Photorefractive keratectomy in the management of postradial keratotomy hyperopia and astigmatism.

J Res Med Sci 2017 28;22:82. Epub 2017 Jul 28.

Isfahan Eye Research Center, Feiz Eye Hospital, Isfahan University of Medical Sciences, Isfahan, Iran.

Background: The aim of this study is to evaluate the results of photorefractive keratectomy (PRK) in the management of postoperative hyperopia and astigmatism in patients with history of radial keratotomy (RK).

Materials And Methods: This prospective nonrandomized noncomparative interventional case series enrolled consecutive eyes treated with PRK after RK. In cases, in which (1) wavefront (WF) scan was undetectable during primary examinations; and/or, (2) WF data were not transferable to the excimer laser device, patients were treated with the tissue-saving (TS) mode. Read More

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http://dx.doi.org/10.4103/jrms.JRMS_478_15DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5553247PMC
July 2017
9 Reads

Topography-Guided Photorefractive Keratectomy in the Treatment of Corneal Scarring.

J Refract Surg 2017 Sep;33(9):639-644

Purpose: To report the outcome of topography-guided photorefractive keratectomy (TG-PRK) in the treatment of patients with corneal scarring.

Methods: A retrospective, interventional case series including 6 eyes of 6 patients with corneal scarring and irregular astigmatism who underwent TG-PRK. The etiologies for scarring were: infectious corneal ulcers, foreign body trauma, LASIK flap buttonhole, and lamellar keratoplasties performed to correct corneal perforation secondary to corneal melting. Read More

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http://dx.doi.org/10.3928/1081597X-20170718-03DOI Listing
September 2017
13 Reads

Codeine Plus Acetaminophen for Pain After Photorefractive Keratectomy: A Randomized, Double-Blind, Placebo-Controlled Add-On Trial.

Cornea 2017 Oct;36(10):1206-1212

Department of Ophthalmology, University of São Paulo Medical School General Hospital, University of São Paulo, São Paulo, Brazil.

Background: Pain after photorefractive keratectomy (PRK) is significant, and the analgesic efficacy and safety of oral opioids in combination with acetaminophen has not been fully investigated in PRK trials.

Purpose: To assess the efficacy and safety of the combination of codeine plus acetaminophen (paracetamol) versus placebo as an add-on therapy for pain control after PRK.

Study Design: Randomized, double-blind, placebo-controlled trial. Read More

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http://dx.doi.org/10.1097/ICO.0000000000001328DOI Listing
October 2017
14 Reads

Stereoacuity after Wavefront-guided Photorefractive Keratectomy in Anisometropia.

J Ophthalmic Vis Res 2017 Jul-Sep;12(3):265-269

Negah Eye Center, Tehran, Iran.

Purpose: To determine changes in stereoacuity in anisometropic myopic eyes after photorefractive keratectomy (PRK).

Methods: Myopic patients with at least 1 diopter (D) of anisometropia in sphere, astigmatism, or spherical equivalent who were referred to our hospital for excimer refractive surgery were enrolled as a prospective sequential interventional case series. All patients underwent wavefront-guided photorefractive keratectomy (WFG-PRK) using the Technolas Perfect Vision (217z) Excimer laser machine. Read More

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http://dx.doi.org/10.4103/jovr.jovr_138_16DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5525494PMC
August 2017
12 Reads

[Visual improvement by aberration-free excimer laser retreatment : Therapy after combined photorefractive keratectomy and keratome laser in situ keratomileusis treatment].

Ophthalmologe 2018 Jun;115(6):509-513

Klinik für Augenheilkunde, Goethe-Universität Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Deutschland.

A 23-year-old male patient presented with reduced visual acuity of the right eye, along with halos and starbursts in both eyes after a one-stage tissue-saving treatment, a combination of myopic photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK). After an extensive preliminary examination and analysis of the examination results, aberration-free LASIK retreatment for reducing astigmatism and enlargement of the optical zone with an excimer laser was performed on the right eye. The visual performance and the subjectively perceived optical quality improved postoperatively. Read More

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http://link.springer.com/10.1007/s00347-017-0529-4
Publisher Site
http://dx.doi.org/10.1007/s00347-017-0529-4DOI Listing
June 2018
12 Reads

Predictors of myopic photorefractive keratectomy retreatment.

J Cataract Refract Surg 2017 Jun;43(6):825-832

From the Department of Ophthalmology (Pokroy), Assaf Harofeh Medical Center, Zerifin, affiliated to the Sackler Faculty of Medicine, Tel Aviv University, Care-Vision Laser Centers (Sela, Munzer, Kaiserman), Tel-Aviv, the Department of Ophthalmology (Mimouni), Rambam Health Care Campus, Haifa, and the Department of Ophthalmology (Kaiserman), Barzilai Medical Center, Ashkelon, and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba, Israel.

Purpose: To determine the factors associated with retreatment after photorefractive keratectomy (PRK) in myopic eyes.

Setting: Care-Vision Laser Centers, Tel-Aviv, Israel.

Design: Retrospective cohort study. Read More

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http://dx.doi.org/10.1016/j.jcrs.2017.06.001DOI Listing
June 2017
16 Reads

Astigmatic treatment with photorefractive keratectomy: Investigations of non-keratometric ocular astigmatism.

J Curr Ophthalmol 2017 Jun 4;29(2):98-102. Epub 2017 Feb 4.

Department of Ophthalmology, Faculty of Medicine Building, University of Malaya, Kuala Lumpur, Malaysia.

Purpose: To evaluate the effect of non-keratometric ocular astigmatisms on visual and refractive outcomes after photorefractive keratectomy (PRK) for correction of myopic astigmatisms.

Methods: Seventy one eyes of 36 subjects were enrolled in this study. Patients underwent PRK for treatment of myopia. Read More

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http://dx.doi.org/10.1016/j.joco.2016.12.001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5463002PMC
June 2017
10 Reads

The use of WaveLight Contoura to create a uniform cornea: the LYRA Protocol. Part 3: the results of 50 treated eyes.

Authors:
Manoj Motwani

Clin Ophthalmol 2017 16;11:915-921. Epub 2017 May 16.

Motwani LASIK Institute, San Diego, CA, USA.

Purpose: To demonstrate how using the Wavelight Contoura measured astigmatism and axis eliminates corneal astigmatism and creates uniformly shaped corneas.

Patients And Methods: A retrospective analysis was conducted of the first 50 eyes to have bilateral full WaveLight Contoura LASIK correction of measured astigmatism and axis (vs conventional manifest refraction), using the Layer Yolked Reduction of Astigmatism Protocol in all cases. All patients had astigmatism corrected, and had at least 1 week of follow-up. Read More

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http://dx.doi.org/10.2147/OPTH.S133841DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5440063PMC
May 2017
10 Reads

The use of WaveLight Contoura to create a uniform cornea: the LYRA Protocol. Part 2: the consequences of treating astigmatism on an incorrect axis via excimer laser.

Authors:
Manoj Motwani

Clin Ophthalmol 2017 16;11:907-913. Epub 2017 May 16.

Motwani LASIK Institute, San Diego, CA, USA.

Purpose: To show how an incorrect manifest astigmatism axis can cause an abnormal induced astigmatism on a new axis.

Patients And Methods: Four eyes of three patients were treated primarily with WaveLight EX500 wavefront optimized (WFO) treatments for astigmatism. All four eyes needed enhancements and were analyzed retrospectively via WaveLight Contoura to determine the reason for the incorrect astigmatism treatment. Read More

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http://dx.doi.org/10.2147/OPTH.S133840DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5440067PMC
May 2017
12 Reads

The use of WaveLight Contoura to create a uniform cornea: the LYRA Protocol. Part 1: the effect of higher-order corneal aberrations on refractive astigmatism.

Authors:
Manoj Motwani

Clin Ophthalmol 2017 16;11:897-905. Epub 2017 May 16.

Motwani LASIK Institute, San Diego, CA, USA.

Purpose: To demonstrate how higher-order corneal aberrations can cancel out, modify, or induce lower-order corneal astigmatism.

Patients And Methods: Six representative eyes are presented that show different scenarios in which higher-order aberrations interacting with corneal astigmatism can affect the manifest refraction. WaveLight Contoura ablation maps showing the higher-order aberrations are shown, as are results of correction with full measured correction using the LYRA (Layer Yolked Reduction of Astigmatism) Protocol. Read More

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http://dx.doi.org/10.2147/OPTH.S133839DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5440064PMC
May 2017
12 Reads

Corneal Breakthrough Haze After Photorefractive Keratectomy With Mitomycin C: Incidence and Risk Factors.

Cornea 2017 Aug;36(8):961-966

*Department of Ophthalmology, Barzilai University Medical Center, Ashkelon, Israel; †Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel; ‡Care Vision Laser Centers, Tel Aviv, Israel; and §Department of Ophthalmology, Rambam Health Care Campus, Haifa, Israel.

Purpose: To identify preoperative and intraoperative factors affecting breakthrough corneal haze incidence after photorefractive keratectomy (PRK) with mitomycin C (MMC).

Methods: In this retrospective study of PRK performed at the Care Vision Refractive Laser Center, Tel Aviv, Israel, a total of 7535 eyes (n = 3854 patients; mean age ± SD, 26 ± 6 years; 55% men) underwent PRK with intraoperative MMC application. Patients with histories of corneal pathology or surgery were excluded. Read More

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http://dx.doi.org/10.1097/ICO.0000000000001231DOI Listing
August 2017
73 Reads

A case report of central toxic keratopathy in a patient post TransPRK (followed by corneal collagen cross-linking).

Int Med Case Rep J 2017 15;10:131-138. Epub 2017 Apr 15.

Emmetropia Mediterranean Eye Institute, Heraklion, Crete, Greece.

Purpose: The purpose of this article is to report a case of central toxic keratopathy in a patient post transepithelial photorefractive keratectomy (TransPRK), followed immediately by corneal collagen cross-linking.

Methods: This article describes the case of a 26-year-old male after bilateral aberration-free, TransPRK laser (Schwind Amaris 750S). The procedure was performed for compound myopic astigmatism in November 2015, followed immediately by accelerated corneal collagen cross-linking for early keratoconus. Read More

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http://dx.doi.org/10.2147/IMCRJ.S123327DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5399977PMC
April 2017
20 Reads

Visual outcomes of laser vision correction in eyes with preoperative amblyopia.

J Cataract Refract Surg 2017 Mar;43(3):383-388

From the Department of Ophthalmology (Sorkin, Varssano, Smadja, Klein, Rosenblatt), Tel Aviv Sourasky Medical Center, affiliated with the Sackler School of Medicine, Tel Aviv University, Care Vision Refractive Surgery Facility (Sorkin), Tel Aviv, and the Department of Ophthalmology (Mimouni), Rambam Health Care Campus, Haifa, Israel.

Purpose: To evaluate the visual outcomes of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) in amblyopic eyes.

Setting: Care Vision Refractive Clinic, Tel Aviv, Israel.

Design: Retrospective case series. Read More

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http://dx.doi.org/10.1016/j.jcrs.2016.12.029DOI Listing
March 2017
8 Reads