1,675 results match your criteria Astigmatism LASIK


Effect of Postoperative Ocular Residual Astigmatism (ORA) on Treatment Outcome After Myopic Laser in situ Keratomileusis (LASIK).

Clin Ophthalmol 2022 23;16:2079-2092. Epub 2022 Jun 23.

Department of Ophthalmology, Heinrich-Heine-University Duesseldorf, Duesseldorf, North Rhine-Westphalia, Germany.

Purpose: To analyze the impact of postoperative ocular residual astigmatism (ORA) on refraction, visual acuity and subjective satisfaction after myopic laser-in-situ-keratomileusis (LASIK) by a comprehensive analysis, which includes clinically relevant data and patient-reported outcomes.

Material And Methods: To evaluate the influence of ORA, comparison groups were built following Archer et al. Myopic patients were subdivided by the fraction ORA/MRC (matched and not matched for MRC) (MRC = manifest refractive cylinder), ORA magnitude and CA magnitude in high ORA eyes (CA = corneal astigmatism). Read More

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Comparison of surgically induced astigmatic changes after cataract surgery in post-Laser in situ keratomileusis corneas versus virgin eyes.

Arq Bras Oftalmol 2022 May 9. Epub 2022 May 9.

Department of Ophthalmology, School of Medicine, Koc University, Istanbul, Turkey.

Purpose: Postoperative refraction in modern mi-croincision cataract surgery gained extra importance in patients with the previous laser-assisted in situ keratomileusis (LASIK) surgery. The surgically induced astigmatic changes in those eyes may differ not only in magnitude but also in direction compared to virgin corneas. This study aimed to compare the surgically induced astigmatic changes after microscopic cataract surgery between post-LASIK corneas and virgin eyes. Read More

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Femtosecond laser-assisted in situ keratomileusis with topography-guided or asphericity-adjusted derived data: a comparative contralateral eye study.

BMC Ophthalmol 2022 Apr 25;22(1):189. Epub 2022 Apr 25.

FPS-IMIP, Av Mal. Mascarenhas de Morais, Recife, PE, 4861, Brazil.

Background: Wavefront-optimized laser-assisted in situ keratomileusis (LASIK) ablation is the most commonly performed procedure in refractive surgery, but new technologies have become available. Our goal was to compare topography-guided (Contoura) and asphericity-guided (Custom-Q) customized ablation treatments for the correction of myopia with or without astigmatism.

Methods: This prospective, randomized, double-blind, contralateral eye study included 60 eyes of 30 patients with myopia or myopic astigmatism requiring femtosecond LASIK (FemtoLASIK) treatment. Read More

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Comparison of Corneal Optical Quality After SMILE, Wavefront-Optimized LASIK and Topography-Guided LASIK for Myopia and Myopic Astigmatism.

Front Med (Lausanne) 2022 5;9:870330. Epub 2022 Apr 5.

Department of Ophthalmology, Peking University Third Hospital, Beijing, China.

Purpose: To compare visual outcomes and corneal optical quality after small incision lenticule extraction (SMILE), wavefront-optimized (WFO) FS-LASIK, and topography-guided customized ablation treatment (TCAT) FS-LASIK for myopia.

Methods: This prospective case-series study included 283 eyes of 283 myopic patients who underwent SMILE or FS-LASIK. There were 102, 100, and 81 eyes in the SMILE group, WFO group and TCAT group, respectively. Read More

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Topography-Guided FS-LASIK With PAE Algorithm and Sirius Tomography Data for Correction of Myopia and Myopic Astigmatism.

J Refract Surg 2022 Apr 1;38(4):235-242. Epub 2022 Apr 1.

Purpose: To compare the clinical outcomes after topography-guided and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) planned with the Phorcides Analytic Engine (PAE) algorithm system and Sirius tomography data for correction of myopia and myopic astigmatism when the ocular residual astigmatism (ORA) was great or not.

Methods: In this retrospective study, a total of 163 eyes with myopia and myopic astigmatism (99 patients) were included. Eyes with myopic astigmatism and high ORA of 0. Read More

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[Advances in the research of centration in small incision lenticule extraction].

Authors:
S T Liu

Zhonghua Yan Ke Za Zhi 2022 Apr;58(4):303-308

Affiliated Eye Hospital of Nanchang University, Nanchang 330006, China.

Small incision lenticule extraction (SMILE) is a new technique that exhibits excellent efficacy, safety and predictability for the correction of myopia and myopic astigmatism. However, one potential limitation of this technique is that the centration during femtosecond laser cutting might be subject to the surgeon's experience and patient's cooperation. To achieve accurate centration in SMILE is the key to obtaining good postoperative visual outcomes. Read More

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Traumatic Flap Complications After Femtosecond LASIK.

Cornea 2022 May;41(5):604-608

Siena Eye Laser, Poggibonsi, Siena, Italy.

Purpose: The purpose of this article was to evaluate the prognosis of traumatic flap dislocation or avulsion in a large series of laser-assisted in situ keratomileusis (LASIK) cases.

Methods: Retrospective, consecutive, noncomparative case series analyzes the visual and anatomical results after flap dislocation or avulsion, caused by trauma occurred at least 1 month after LASIK.

Results: A total of 37,315 eyes of 19,602 patients were reviewed. Read More

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Vector analysis of high astigmatism (≥ 2.0 diopters) correction after small-incision lenticule extraction with stringent head positioning and femtosecond laser-assisted laser in situ keratomileusis with compensation of cyclotorsion.

BMC Ophthalmol 2022 Apr 5;22(1):157. Epub 2022 Apr 5.

Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, No. 1 Dongjiaomin Xiang, Dongcheng District, 100730, Beijing, China.

Background: The purpose of this study was to compare the astigmatic correction by vector analysis in patients with high myopic astigmatism after femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) with cyclotorsion compensation or small-incision lenticule extraction (SMILE) with stringent head positioning.

Setting: Beijing Aier-Intech Eye Hospital, Beijing, China.

Design: A retrospective case series. Read More

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Ten-Year Outcome of Topography-Guided Transepithelial Surface Ablation for Refractive Myopia Treatment.

Klin Monbl Augenheilkd 2022 Apr 23;239(4):382-385. Epub 2022 Mar 23.

Augenklinik, Luzerner Kantonsspital, Luzern, Switzerland.

Background: To evaluate 10-year long-term refractive visual stability and participants' satisfaction in the refractive treatment of myopic eyes undergoing topography-guided transepithelial surface ablation using a 1KHz excimer laser.

Patients And Methods: This single-center prospective survey assessed participants' satisfaction 10 years after the treatment using a non-validated questionnaire with regards to visual outcome, dry eye, and visual disturbance symptoms. Pre- and postoperative visual and refractive data were evaluated. Read More

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Deep anterior lamellar keratoplasty versus penetrating keratoplasty: comparison of clinical outcomes in contralateral eyes.

Arq Bras Oftalmol 2022 Mar 21. Epub 2022 Mar 21.

Department of Ophthalmology, Kartal City Hospital, University of Health Sciences Dr. Lutfi Kırdar, Istanbul, Turkey.

Purpose: This study aimed to compare the clinical outcomes following deep anterior lamellar keratoplasty and penetrating keratoplasty in contralateral eyes of the same patients.

Methods: In this retrospective, comparative case series, clinical outcome data included best-corrected visual acuity, refractive spherical equivalent, refractive astigmatism, endothelial cell density, endothelial cell loss, central corneal thickness, and intraocular pressure, which were evaluated at 6, 12, 24, and 36 months after deep anterior lamellar keratoplasty and penetrating keratoplasty. Additionally, complications were assessed. Read More

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The false positive rates for detecting keratoconus and potential ectatic corneal conditions when evaluating astigmatic eyes with Scheimpflug Technology.

Eur J Ophthalmol 2022 Mar 21:11206721221081467. Epub 2022 Mar 21.

481087Gavin Herbert Eye Institute, University of California, Irvine, California, USA.

Purpose: To quantify the false positive rates for keratoconus (KC) and potential ectatic corneal conditions in highly astigmatism eyes when using published parameters/indices obtained from the Pentacam and Galilei units.

Setting: Oftalmosalud Instituto de Ojos, Lima, Peru.

Design: Prospective cohort study. Read More

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Comparison of Optical Zone Decentration Following FS-LIKE and SMI-LIKE for Correcting Hyperopia.

J Refract Surg 2022 Mar 1;38(3):184-190. Epub 2022 Mar 1.

Purpose: To investigate optical zone decentration following femtosecond laser-assisted lenticule intrastromal keratoplasty (FS-LIKE) or small incision lenticule intrastromal keratoplasty (SMI-LIKE) for correcting hyperopia.

Methods: This study analyzed decentration values obtained from optical coherence tomography (OCT) and tangential topography difference maps of 23 eyes (18 patients) undergoing FS-LIKE (n = 12) or SMI-LIKE (n = 11) via the concentric centration method. Total higher order aberrations (HOAs) and component aberrations were measured preoperatively and 6 months postoperatively. Read More

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Hemidivisional vector planning to reduce and regularize irregular astigmatism by laser treatment.

Graefes Arch Clin Exp Ophthalmol 2022 Mar 9. Epub 2022 Mar 9.

NewVision Clinics, Melbourne, Australia.

Purpose: To demonstrate how hemidivisional vector planning of refractive laser treatments of astigmatism can be used to directly address idiopathic corneal irregular astigmatism that has an asymmetrical, non-orthogonal bow tie topography appearance.

Design: Case study.

Methods: The cornea is conceptually divided into two hemidivisions along the flat meridian of the corneal topographic astigmatism (CorT), which means that each hemidivision will approximately correspond to one lobe of the asymmetric, non-orthogonal topographic bow tie. Read More

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iSMART Contoura laser-assisted keratomileusis: A new planning software.

Authors:
Zain Khatib

Indian J Ophthalmol 2022 Mar;70(3):1073

Khatib Eye Clinic, Mumbai, Maharashtra, India.

Background: Topography guided laser-assisted in situ keratomileusis (LASIK) has always been some sort of an enigma in terms of its understanding and interpretation. Contoura LASIK is one such form of FDA approved topography guided LASIK on the Wavelight platform for virgin eyes. Inspite of promising so much, its complete application has not yet been fully understood and cannot be applied for all cases. Read More

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Clinical and Refractive Outcomes after Topography-guided Refractive Surgery Planned Using Phorcides Surgery Planning Software.

J Cataract Refract Surg 2022 Feb 10. Epub 2022 Feb 10.

Woolfson Eye Institute, 800 Mt. Vernon Hwy., NE, Suite 120, Atlanta, GA 30328, American Corneal Consultants, 15 Island Rd., North Oaks, MN 55127, Mann Eye Institute and Laser Centers, 5115 Main St, Suite#300, Houston, Texas 77002, TLC Laser Eye Center, 16305 Swingley Ridge Rd, Suite 375, Chesterfield MO 63017-1777 , 1002 N Church Street, Suite 101, Greensboro NC 27401, Science in Vision, 127 NW Revere Ave, Bend, OR 97703,

Purpose: To evaluate prospectively the clinical outcomes of topography-guided laser in situ keratomileusis (LASIK) surgery performed with Contoura® Vision using the Wavelight® excimer laser and planned with the Phorcides Analytical Engine.

Setting: Four clinical practices in the USA.

Design: Prospective, single-arm interventional study. Read More

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February 2022

Refractive Outcomes After LASIK for the Treatment of Mixed Astigmatism with the Allegretto WaveLight EX500.

Ophthalmol Ther 2022 Apr 15;11(2):785-795. Epub 2022 Feb 15.

Hoopes Vision, HDR Research Center, Ophthalmology University of Utah Health Sciences Center, 11820 S. State Street Suite #200, Draper, UT, 84020, USA.

Introduction: Treatment of mixed astigmatism with laser in situ keratomileusis (LASIK) is complex as the correction requires flattening the cornea in one meridian while steepening the cornea in the other meridian. The bitoric technique has become the most popular approach and has been tested across a variety of platforms. This study is the first to evaluate the results of mixed astigmatism treatment using the Allegretto WaveLight EX500. Read More

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Comparison of the Clinical Outcomes between Combined Femtosecond Laser-Assisted In Situ Keratomileusis and Corneal Cross Linking versus Combined Small-Incision Lenticule Extraction and Corneal Cross Linking.

Authors:
Yu Di Fei Mo Ying Li

J Ophthalmol 2022 31;2022:6994355. Epub 2022 Jan 31.

Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China.

Purpose: The purpose of this study was to compare femtosecond laser-assisted in situ keratomileusis with prophylactic cross linking (FS-LASIK Xtra) and small-incision lenticule extraction with prophylactic cross linking (SMILE Xtra) in terms of their postoperative clinical outcomes.

Methods: In this retrospective study, 24 patients (48 eyes) with myopia and myopia astigmatism were recruited from 2017 to 2018. All patients underwent comprehensive ophthalmic examinations preoperatively and follow-up visits at one and three months. Read More

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January 2022

Prospective, Randomized, Contralateral Eye Comparison of Functional Optical Zone, and Visual Quality After SMILE and FS-LASIK for High Myopia.

Transl Vis Sci Technol 2022 Feb;11(2):13

State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Guangdong Provincial Clinical Research Center for Ocular Diseases, Sun Yat-sen University, Guangzhou, People's Republic of China.

Purpose: To compare the functional optical zone (FOZ) and visual quality after small-incision lenticule extraction (SMILE) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) in correcting high myopia.

Methods: Ninety-two eyes of 46 high myopic patients with the same programmed optical zone (POZ) received SMILE in one eye and FS-LASIK in the contralateral eye. FOZ was calculated using a refractive power method. Read More

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February 2022

Long-term efficacy and safety profiles following small incision lenticule extraction in eyes with ≥ 5-year follow-up.

Eur J Ophthalmol 2022 Feb 1:11206721221077541. Epub 2022 Feb 1.

427028Department of Cornea and Refractive Surgery, Instituto Microcirugía Ocular (IMO) Barcelona, Spain.

Purpose: To evaluate long-term efficacy, safety, predictability and stability (refractive and keratometric) of myopic and myopic astigmatism correction with Small Incision Lenticule Extraction (SMILE).

Methods: Single center retrospective review of eyes undergoing SMILE from 2012-2015. Forty-two eyes (23 patients) with ≥ 5-year follow-up. Read More

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February 2022

Post-operative outcomes of small-incision lenticule extraction in patients with moderate to high astigmatism.

Indian J Ophthalmol 2022 Feb;70(2):396-399

Uma Eye Clinic, Chennai, Tamil Nadu, India.

Purpose: To evaluate the visual outcomes of patients who underwent small-incision lenticule extraction (SMILE) for the treatment of myopic astigmatism with high cylinders (>2.5 diopters, D).

Methods: Forty-two eyes of myopic astigmatism with a spherical error of magnitude between - 0. Read More

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February 2022

The Impact of Learning Curve on Flap Thickness Outcome in Femtosecond Laser-assisted Laser In Situ Keratomileusis Performed with New LenSx Dual Platform.

Korean J Ophthalmol 2022 06 24;36(3):202-209. Epub 2022 Jan 24.

Department of Ophthalmology, Tinaztepe Galen Hospital, Izmir, Turkey.

Purpose: To evaluate the effect of learning curve on flap thickness (FT) outcome in femtosecond (FS) laser-assisted laser in situ keratomileusis (LASIK) operation for myopia performed with recently introduced LenSx dual platform using curved applanation cone.

Methods: Seventy eyes of 36 patients with myopia or myopic astigmatism operated with FS laser-assisted LASIK with recently introduced LenSx dual platform were evaluated in this retrospective study. Operations were divided into two groups: first 20 operations (20 eyes of 10 patients) and next 50 operations (50 eyes of 26 patients). Read More

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Treatment of Corneal Irregularity in Radial/Astigmatic Keratotomy Patients Utilizing WaveLight Contoura.

Authors:
Manoj Motwani

Clin Ophthalmol 2022 11;16:111-126. Epub 2022 Jan 11.

Motwani LASIK Institute, San Diego, CA, 92121, USA.

Purpose: To demonstrate the treatment of radial keratotomy-induced corneal irregularity with topographic-guided ablation (WaveLight Contoura).

Methods: Thirty-two eyes of 18 patients were treated for corneal irregularity post-radial keratotomy with WaveLight Contoura topographic-guided ablation utilizing LASIK and PRK and the San Diego Protocol for reconstructing corneas. These eyes were followed for six-months. Read More

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January 2022

Comparison of the Cost-Effectiveness of SMILE, FS-LASIK, and PRK for Myopia in a Private Eye Center in Spain.

J Refract Surg 2022 01 1;38(1):21-26. Epub 2022 Jan 1.

Purpose: To describe and compare the cost-effectiveness of small incision lenticule extraction (SMILE), femtosecond laser-assisted in situ keratomileusis (FS-LASIK), and photorefractive keratectomy (PRK) for treating myopia and myopic astigmatism in a private eye center.

Methods: The perspectives for this cost-effectiveness analysis were for the payer and the health care sector. For the payer's perspective, a decision tree model was made, with a time period of 30 years, and the average weighted utility values and quality-adjusted life years (QALY) were computed for each procedure. Read More

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January 2022

Evaluation of peripapillary - macular microvascularity and choroidal vascularity index after refractive surgery.

Photodiagnosis Photodyn Ther 2022 Mar 5;37:102714. Epub 2022 Jan 5.

University of Health Sciences Turkey, Beyoglu Eye Training and Research Hospital, Bereketzade Street Number:2, Beyoglu, Istanbul, Turkey. Electronic address:

Background: To evaluate the microvascularity and choroidal vascularity index (CVI) using optical coherence tomography angiography (OCTA) and OCT following femtosecond laser-assisted in-situ keratomileusis (FS-LASIK) and small incision lenticule extraction (SMILE) procedures.

Methods: Patients with myopia (<-6.0D sphere) or myopic astigmatism (<-4. Read More

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Scheimpflug Topography Oriented Adequate Repositioning of a Misaligned Free Flap after Laser in situ Keratomileusis.

Case Rep Ophthalmol 2021 Sep-Dec;12(3):889-893. Epub 2021 Nov 8.

Department of Ophthalmology, Sanggye Paik Hospital, Inje University of Korea, College of Medicine, Seoul, Republic of Korea.

This report describes a case of Scheimpflug topography oriented adequate repositioning of a misaligned thick free flap after laser in situ keratomileusis (LASIK). A 24-year-old patient consulted for irregular astigmatism and disoriented free right eye flap. The patient previously underwent binocular LASIK at a private clinic. Read More

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November 2021

Corneal Asphericity and Higher-Order Aberrations after FS-LASIK and Trans-PRK for Myopia.

J Ophthalmol 2021 6;2021:3765046. Epub 2021 Dec 6.

Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin 300384, China.

Objective: To compare the corneal asphericity and higher-order aberrations (HOAs) of femtosecond laser-assisted in situ keratomileusis (FS-LASIK) with Smart Pulse Technology (SPT) assisted transepithelial photorefractive keratectomy (Trans-PRK) for myopia and myopic astigmatism correction.

Methods: This prospective study analyzed 88 eyes of 44 patients treated with FS-LASIK and 64 eyes of 32 patients treated with Trans-PRK. All eyes had low to moderate myopia with or without astigmatism (spherical equivalent (SE) <-6. Read More

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December 2021

Effect of Myopic Femtosecond Laser-Assisted LASIK on Anterior Chamber Inflammation (Flare Values) and Corneal Endothelium: A Prospective before and after Study.

J Ophthalmol 2021 26;2021:2395028. Epub 2021 Nov 26.

Istanbul University, Istanbul Faculty of Medicine, Department of Ophthalmology, Istanbul, Turkey.

Purpose: This study aimed to investigate whether femtosecond laser-assisted LASIK (FS-LASIK) surgery causes inflammation in the anterior chamber and to analyze its effect on endothelial cells.

Methods: This prospective, longitudinal study included left eyes of 30 patients (19 females) who had undergone FS-LASIK surgery due to myopia and myopic astigmatism. Endothelial cell density (ECD) and morphological measurements were performed using a specular microscopy, and laser flare photometry was used to measure the anterior chamber flare values on the day of surgery. Read More

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November 2021

Comparison of clinical outcomes of LASIK, Trans-PRK, and SMILE for correction of myopia.

J Chin Med Assoc 2022 02;85(2):145-151

Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.

Transepithelial photorefractive keratectomy (Trans-PRK), laser-assisted in situ keratomileusis (LASIK), and small incision lenticule extraction (SMILE) are three mainstay refractive surgeries worldwide. The applicability, efficacy, safety, and predictability of these different techniques are quite similar. Trans-PRK has the strongest biostability, earliest return to normal corneal sensitivity but the longest recovery time, most uncomfortable postoperative experience, and possibility of corneal haze. Read More

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February 2022

Prospective, Randomized Contralateral Eye Comparison of Wavefront-Guided Laser In Situ Keratomileusis and Small Incision Lenticule Extraction Refractive Surgeries.

Am J Ophthalmol 2022 05 14;237:211-220. Epub 2021 Nov 14.

From the Department of Ophthalmology, Byers Eye Institute at Stanford, Stanford University, Palo Alto, California, USA.. Electronic address:

Purpose: Wavefront-guided laser in situ keratomileusis (WFG-LASIK) and small incision lenticule extraction (SMILE) are keratorefractive surgeries that can improve uncorrected visual acuity in myopic patients. Comparison of visual outcomes in myopic patients treated with LASIK and SMILE is needed.

Design: Prospective, randomized contralateral eye-controlled trial. Read More

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