789 results match your criteria Hyperopia LASIK


Case Series: Application of Topography-guided Contoura Refractive Surgery in Highly Irregular Cornea.

Optom Vis Sci 2021 Jun;98(6):557-562

Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Shandong, China.

Significance: Highly irregular cornea leads to poor vision, glare, and starbursts. Although treatment is still at the exploration stage, topography-guided Contoura surgery has excellent potential for the treatment of highly irregular corneas.

Purpose: This case series reviews three patients (one with abnormal back elevation, one with corneal scar after fungal keratitis, and one with post-laser-assisted in situ keratomileusis central islands) treated with topography-guided Contoura surgery. Read More

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Comparison of Visual Outcome After Hyperopic LASIK Using a Wavefront-Optimized Platform Versus Other Excimer Lasers in the Past Two Decades.

Ophthalmol Ther 2021 May 19. Epub 2021 May 19.

Hoopes Vision Research Center, Draper, UT, USA.

Introduction: Laser-assisted in-situ keratomileusis (LASIK) for the correction of hyperopia and hyperopic astigmatism is challenging and has been less studied than for the correction of myopia and myopic astigmatism. The aim of this study was to analyze the refractive outcomes of LASIK in hyperopia and hyperopic astigmatic eyes using a wave-front optimized laser platform (the Allegretto EX500 laser) and perform a historical comparison with other excimer lasers within the past two decades.

Methods: A one-center (Tertiary Refractive Center, Draper, Utah), retrospective, non-comparative study was conducted on 379 eyes treated with LASIK for hyperopia and hyperopic astigmatism. Read More

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Vision Restoration: Cataract Surgery and Surgical Correction of Myopia, Hyperopia, and Presbyopia.

Med Clin North Am 2021 May 2;105(3):445-454. Epub 2021 Apr 2.

McKnight Vision Research Center, Bascom Palmer Eye Institute, University of Miami-Miller School of Medicine, 900 Northwest 17th Street, Miami, FL 33136, USA.

Cataract surgery is one of the most common surgical procedures performed in the United States. The decision to remove a cataract is determined by the patient's ability to perform activities of daily living, such as reading, driving, and watching television. Cataract surgery also offers the potential of spectacle independence with a wide array of premium intraocular lens options. Read More

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Simulated biomechanical effect of aspheric transition zone ablation profiles after conventional hyperopia refractive surgery.

Math Biosci Eng 2021 03;18(3):2442-2454

Key Laboratory of Nondestructive Test (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China.

We studied the effects of the aspheric transition zone on the optical wavefront aberrations, corneal surface displacement, and stress induced by the biomechanical properties of the cornea after conventional laser in situ keratomileusis (LASIK) refractive surgery. The findings in this study can help improve visual quality after refractive surgery. Hyperopia correction in 1-5D was simulated using five types of aspheric transition zones with finite element modeling. Read More

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Assessment of Refractive Outcomes of Femtosecond-assisted Laser in Situ Keratomileusis (LASIK) for Hyperopia.

J Coll Physicians Surg Pak 2021 Apr;30(4):434-439

Department of Refractive Surgery, Armed Forces Institute of Ophthalmology, Rawalpindi, Pakistan.

Objective: To determine the effect of refractive treatment in terms of safety, efficacy, stability, accuracy, and predictability with Wavefront Optimized Laser-assisted in situ keratomileusis (LASIK) on hyperopia.

Study Design: Descriptive, analytical study.

Place And Duration Of Study: Armed Forces Institute of Ophthalmology, National University of Medical Sciences, Rawalpindi, Pakistan from August 2013 to June 2018. Read More

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[Refractive surgery for hyperopia].

J Fr Ophtalmol 2021 May 6;44(5):723-729. Epub 2021 Apr 6.

Service d'ophtalmologie, Hôpital d'instruction des Armées Percy, 101, avenue Henri-Barbusse, BP 406, 92141 Clamart cedex, France; École du Val-de-Grâce, 1, place Alphonse-Laveran, 75230 Paris cedex 05, France.

Hyperopia is a refractive error in which light is focused behind, instead of on, the retina. Clear vision can be obtained by accommodation, but in the long run, this results in eye strain. Hyperopia can be classified as low [≤2. Read More

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The 25th Anniversary of Laser Vision Correction in the United States.

Authors:
Stephen N Joffe

Clin Ophthalmol 2021 17;15:1163-1172. Epub 2021 Mar 17.

History of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA.

Laser Vision Correction (LVC) is an elective, self-pay and safe surgical procedure to correct myopia and hyperopia. Since FDA approval 25 years ago, there have been a progression of technological improvements leading to better outcomes and LVC is now one of the safest surgical procedures. With a potential pool of 50 million patients, 6000 trained ophthalmic surgeons regularly treating in over 1000 centers of which 65% are physician owned. Read More

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Femtosecond-LASIK outcomes using the VisuMax-MEL 80 platform for hyperopia and hyperopic astigmatism refractive surgery.

Exp Ther Med 2021 Mar 26;21(3):288. Epub 2021 Jan 26.

Department of Ophthalmology, Faculty of Medicine, 'Lucian Blaga' University, 550159 Sibiu, Romania.

The present study evaluated the efficacy, the safety and the predictability of the Femtosecond laser-assisted keratomileusis (Femto-LASIK) procedure for hyperopia and hyperopic astigmatism. We retrospectively analyzed the postoperative 12-month evolution of 593 eyes with hyperopia and hyperopic astigmatism that underwent Femto-LASIK treatment. The procedure was predictable and effective. Read More

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Clinical Effectiveness of Laser-Induced Increased Depth of Field for the Simultaneous Correction of Hyperopia and Presbyopia.

J Refract Surg 2021 Jan;37(1):16-24

Purpose: To evaluate the visual outcomes of patients with presbyopic hyperopia, comparing the current standard of monovision treatment with a novel bilateral presbyopic LASIK (Custom-Q mode) technique.

Methods: This prospective comparative study of consecutive eligible patients with presbyopic hyperopia undergoing a bilateral presbyopic laser in situ keratomileusis technique was conducted between January 2018 and February 2019. After contact lens-simulated monovision measurements were obtained, the non-dominant eyes had a negative aspheric ablation profile planned using the Custom-Q nomogram (Alcon Laboratories, Inc). Read More

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January 2021

Wavefront excimer laser refractive surgery for adults with refractive errors.

Cochrane Database Syst Rev 2020 12 18;12:CD012687. Epub 2020 Dec 18.

Department of Ophthalmology, University of Colorado Anschutz Medical Campus, Denver, Colorado, USA.

Background: Refractive errors (conditions in which the eye fails to focus objects accurately on the retina due to defects in the refractive system), are the most common cause of visual impairment. Myopia, hyperopia, and astigmatism are low-order aberrations, usually corrected with spectacles, contact lenses, or conventional refractive surgery. Higher-order aberrations (HOAs) can be quantified with wavefront aberration instruments and corrected using wavefront-guided or wavefront-optimized laser surgery. Read More

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December 2020

December consultation #3.

Authors:
Vandana Jain

J Cataract Refract Surg 2020 12;46(12):1686-1687

Mumbai, India.

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December 2020

December consultation #2.

J Cataract Refract Surg 2020 12;46(12):1685-1686

Mexico City, Mexico.

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December 2020

Presbyopic patient with hyperopia and moderately steep corneas: December consultation #1.

Authors:

J Cataract Refract Surg 2020 12;46(12):1685

A 47-year-old woman was referred for refractive surgery evaluation. She has no ocular or medical history. Spectacle dependence is her chief concern. Read More

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December 2020

Reference Values of the Central Corneal Thickness with Different Refractive Errors for the Adult Egyptian Population.

Authors:
Amr A Gab-Alla

Clin Ophthalmol 2020 22;14:3465-3474. Epub 2020 Oct 22.

Suez Canal University, Faculty of Medicine, Ophthalmology Department, Ismailia, Egypt.

Aim: To generate reference values of the central corneal thickness (CCT) with different refractive errors for the adult eastern Egyptian population.

Subjects And Methods: This study was a retrospective, observational, and cross-sectional study. It included 1166 eyes (1166 subjects) scheduled for LASIK, who came to private refractive eye centre, Ismailia, Egypt. Read More

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October 2020

Manufacture of Contact Lens of Nanoparticle-Doped Polymer Complemented with ZEMAX.

Nanomaterials (Basel) 2020 Oct 15;10(10). Epub 2020 Oct 15.

Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.

Many people suffer from myopia or hyperopia due to the refractive errors of the cornea all over the world. The use of high refractive index (RI), Abbe number (), and visible light transmittance (T%) polymeric contact lenses (CLs) holds great promise in vision error treatment as an alternative solution to the irreversible laser-assisted in situ keratomileusis (LASIK) surgery. Titanium dioxide nanoparticles (TiO NPs) have been suggested as a good candidate to rise the RI and maintain high transparency of a poly(methyl methacrylate) (PMMA)-TiO nanocomposite. Read More

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October 2020

[Elastotonometry for evaluation of biomechanical characteristics of the eye after surgical hyperopia correction].

Vestn Oftalmol 2020 ;136(5):32-38

Postgraduate Doctors' Training Institute, Cheboksary, Russia.

Modern tonometers (Ocular Response Analyzer) can only show the presence of biomechanical disorders of the fibrous membrane, while elastotonometry reacts not only to their presence, but also to their type.

Purpose: To build a mathematical model that would use elastotonometry to assess biomechanical properties of the eye in treatment of hyperopia with and surgeries.

Material And Methods: The study included 64 operations: 34 surgeries, and 31 surgeries. Read More

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October 2020

Pharmacological Therapy for Presbyopia in Patients with Previous Corneal Refractive Surgery: A Pilot Study.

Ophthalmol Ther 2020 Dec 23;9(4):1003-1010. Epub 2020 Sep 23.

Cornea, Cataract and Refractive Surgery Department, VISSUM, Alicante, Spain.

Purpose: To perform a pilot evaluation of a novel pharmacological therapy for presbyopia in patients with previous corneal refractive surgery.

Methods: This interventional study included 130 presbyopic patients. The patients were divided into three groups: (1) LASIK group, which included patients with previous LASIK for myopia or hyperopia; (2) previous presbyopia surgery group, including patients with previous monovision or PresbyLASIK (PresbyMAX, SCHWIND eye-tech-solutions GmbH, Kleinostheim, Germany); and (3) control group, which included presbyopes without any corneal refractive procedure. Read More

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December 2020

What Is LASIK Eye Surgery?

JAMA 2020 08;324(8):815

Department of Ophthalmology, University of Florida, Gainesville.

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Three-Month Outcomes of Laser Vision Correction for Myopia and Hyperopia in Adults With Amblyopia.

J Refract Surg 2020 Aug;36(8):511-519

Purpose: To evaluate the visual outcomes of laser vision correction in adults with myopic and hyperopic amblyopia.

Methods: The medical records of patients diagnosed as having amblyopia who underwent laser refractive surgery between February 2013 and October 2017 were retrospectively reviewed. Eyes with amblyopia were analyzed, and the nonamblyopic fellow eyes of the patients who underwent laser vision correction were used as controls. Read More

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Five-Year Results of Combined Small-Aperture Corneal Inlay Implantation and LASIK for the Treatment of Hyperopic Presbyopic Eyes.

J Refract Surg 2020 Aug;36(8):498-505

Purpose: To evaluate the efficacy of simultaneous laser in situ keratomileusis (LASIK) and small-aperture corneal inlay (KAMRA; AcuFocus, Inc) implantation in hyperopic presbyopic eyes at 5 years postoperatively.

Methods: This was a retrospective single-center study of patients with hyperopia and presbyopia who underwent simultaneous LASIK and corneal inlay implantation by two experienced refractive surgeons. These patients were regularly observed for 5 years and evaluated with serial corneal tomographies and refractive assessments for uncorrected near visual acuity (UNVA), uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), distance-corrected near visual acuity (DCNVA), and manifest refraction spherical equivalent (MRSE). Read More

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Genomic analysis of 21 patients with corneal neuralgia after refractive surgery.

Pain Rep 2020 Jul-Aug;5(4):e826. Epub 2020 Jul 27.

Department of Neurology, Yale University, New Haven, CT, USA.

Background: Refractive surgery, specifically laser-assisted in situ keratomileusis and photorefractive keratectomy, are widely applied procedures to treat myopia, hyperopia, and astigmatism. After surgery, a subgroup of cases suffers from persistent and intractable pain of obscure etiology, thought to be neuropathic. We aimed to investigate the contribution of genomic factors in the pathogenesis of these patients with corneal neuralgia. Read More

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Topography-based customized trans-epithelial phototherapeutic keratectomy for anterior corneal scar removal.

Eur J Ophthalmol 2020 Jul 24:1120672120945907. Epub 2020 Jul 24.

Department of Cornea and Refractive surgery, Narayana Nethralaya, Bangalore, India.

Purpose: To report a case of management of a post-LASIK superficial corneal scar using a novel single-step topography-based customized phototherapeutic keratectomy (PTK).

Methods: Surgical technique description.

Results: Ablation was planned using Schwind Amaris 1050RS excimer laser as decentered trans-epithelial PTK of 5 mm × 3. Read More

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The relationship between patient age and residual refractive error after uneventful laser in situ keratomileusis for moderate-to-high hyperopia.

Eur J Ophthalmol 2020 Jun 28:1120672120937658. Epub 2020 Jun 28.

Eye Clinic "Svjetlost," Sarajevo, Bosnia and Herzegovina.

Purpose: To determine if the manifest sphero-cylindrical residual refractive error, at various time points over a 12-month postop period after laser in situ keratomileusis (LASIK) was associated with patient age at time of surgery.

Methods: Patients with moderate to high hyperopia (3.00-7. Read More

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Femtosecond Laser-Assisted LASIK in Children With Hyperopia and Anisometropic Amblyopia: 7 Years of Follow-up.

J Refract Surg 2020 Jun;36(6):366-373

Purpose: To analyze clinical and functional results of femtosecond laser-assisted laser in situ keratomileusis (FSLASIK) in children with hyperopia and unilateral anisome-tropic amblyopia.

Methods: The study included 24 patients (24 eyes) aged 5 to 15 years. Before the surgery, the mean manifest refractive spherical equivalent (MRSE) of amblyopic eyes was +3. Read More

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Preliminary effects of treating the half of high latent hyperopia on refractive and visual results of femtosecond laser-assisted in situ keratomileusis in subjects with hyperopia.

Int Ophthalmol 2020 Sep 19;40(9):2361-2369. Epub 2020 May 19.

Department of Ophthalmology, TOBB ETU, Ankara, Turkey.

Background: To evaluate the preliminary effects of treating the half of high latent hyperopia on refractive and visual outcomes of femtosecond laser-assisted in situ keratomileusis (LASIK) in young subjects with hyperopia.

Methods: This non-randomized comparative study includes 120 eyes of 60 subjects who underwent femtosecond LASIK to correct hyperopia. Group 1 (n = 60) includes subjects with ≤ 1D algebraic difference (DRSE) between cycloplegic (CRSE) and manifest (MRSE) refraction spherical equivalents and was treated by entering manifest refraction values. Read More

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September 2020

Visual and Refractive Outcomes Following Laser Blended Vision Using Non-linear Aspheric Micro-monovision.

J Refract Surg 2020 May;36(5):300-307

Purpose: To report 1-year visual and refractive outcomes following PRESBYOND Laser Blended Vision using non-linear aspheric micro-monovision with the MEL 90 platform (Carl Zeiss Meditec GmbH).

Methods: Data were collected retrospectively for all patients who underwent treatment for simultaneous correction of refractive error and presbyopia from June 2015 to June 2018. Only those patients who completed at least 6 months of follow-up were included in the study. Read More

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Hyperopic laser keratorefractive surgery: Do steep corneas have worse outcomes?

Int Ophthalmol 2020 Aug 9;40(8):1885-1895. Epub 2020 Apr 9.

Department of Ophthalmology, Barzilai Medical Center, Ashkelon and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba, Israel.

Purpose: To report the visual and refractive outcomes of hyperopic patients undergoing laser keratorefractive surgery in preoperatively steep corneas versus a matched control group.

Methods: Retrospective cohort study. All patients underwent photorefractive keratectomy (PRK) or laser-assisted in situ keratomileusis (LASIK) at Care-Vision Laser Centers, Tel-Aviv, Israel, between 1/2000 and 11/2016. Read More

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Outcome of toric intraocular lenses implanted in eyes with previous corneal refractive surgery.

J Cataract Refract Surg 2020 04;46(4):534-539

From the Department of Ophthalmology, Baylor College of Medicine, Cullen Eye Institute (Cao, Wang, Koch), Houston, Texas, USA; and Aier School of Ophthalmology, Central South University (Cao), Changsha, Hunan Province.

Purpose: To evaluate the outcome of toric intraocular lens (IOL) implantation in eyes with previous laser in situ keratomileusis/photorefractive keratectomy (LASIK/PRK).

Setting: Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, USA.

Design: Retrospective case series. Read More

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