766 results match your criteria peripheral refraction


Myopia Control with Combination Low-Dose Atropine and Peripheral Defocus Soft Contact Lenses: A Case Series.

Case Rep Ophthalmol 2021 May-Aug;12(2):548-554. Epub 2021 Jun 14.

The Myopia Center, Rishon LeZion, Israel.

The goal of this retrospective case series is to demonstrate the effectivity of combination low-dose atropine therapy with peripheral defocus, double concentric circle design with a center distance soft contact lenses at controlling myopia progression over 1 year of treatment. Included in this series are 3 female children aged 8-10 years with progressing myopia averaging -4.37 ± 0. Read More

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Spontaneous filtering bleb with subsequent secondary glaucoma June consultation #1.

J Cataract Refract Surg 2021 Jul;47(7):965

A 32-year-old previously healthy woman was referred for evaluation and management of newly diagnosed hypotony in the right eye. Her ocular history was significant only for moderate myopia and an idiopathic Horner syndrome in the left eye diagnosed at age 13. The patient endorsed a history of fluctuating and decreasing vision in the right eye over the past 6 months. Read More

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Acute Attack of Primary Angle Closure in a Highly Axially Myopic Eye: A Case Report.

Am J Case Rep 2021 Jun 23;22:e931002. Epub 2021 Jun 23.

Department of Ophthalmology, College of Medicine, King Saud University Medical City, King Saud University, Riyadh, Saudi Arabia.

BACKGROUND Primary angle closure (PAC) is common in hyperopic eyes, but it is rarely observed in highly myopic eyes. Myopic eyes have a longer axial length and a deeper anterior chamber compared with emmetropic eyes and are considered to be protected from angle closure secondary to pupillary block. PAC can lead to irreversible loss of vision if left untreated. Read More

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[Results of a two-year clinical study of myopia control with bifocal defocus-inducing soft contact lenses].

Vestn Oftalmol 2021 ;137(3):5-12

National Myopia Institute, Moscow, Russia.

The development of methods for myopia control remains one of the most topical trends in modern ophthalmology. Optical approaches to myopia control employ the induction of peripheral myopic defocus, which can be done with the use of multifocal soft contact lenses (SCLs).

Purpose: To review the results of a two-year multicenter clinical study of myopia control with bifocal defocus-inducing SCLs. Read More

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Disparity between central and peripheral refraction inheritance in twins.

Sci Rep 2021 Jun 9;11(1):12196. Epub 2021 Jun 9.

Laboratorio de Óptica, Instituto Universitario de Investigación en Óptica y Nanofísica, Universidad de Murcia, Campus de Espinardo (Ed. 34), 30100, Murcia, Spain.

The last decades have witnessed a sudden increase in myopia incidence among youngsters that have been related to modern lifestyle along with the use of emerging technologies affecting visual exposure. Increasing exposures to known risk factors for myopia, such as time spent indoors, close-distance work, or low-light conditions are thought to be responsible for this public health issue. In most cases, development of myopia is secondary to a vitreous chamber enlargement, although the related mechanisms and the potential interaction between central and peripheral retinal area remain unclear. Read More

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Autosomal Recessive Bestrophinopathy: Clinical and Genetic Characteristics of Twenty-Four Cases.

J Ophthalmol 2021 30;2021:6674290. Epub 2021 Apr 30.

Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Background: To describe ocular manifestations, imaging characteristics, and genetic test results of autosomal recessive bestrophinopathy (ARB). The study design is an observational case series.

Methods: Forty-eight eyes of 24 patients diagnosed with ARB underwent complete ophthalmic examinations including refraction, anterior and posterior segment examination, enhanced depth imaging optical coherence tomography (EDI-OCT), fluorescein angiography (FA), electroretinography (ERG), and electrooculography (EOG). Read More

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Optical changes and apparent emmetropization in a patient with a peripheral unilateral lens coloboma.

J AAPOS 2021 May 11. Epub 2021 May 11.

Department of Ophthalmology, Shaare Zedek Medical Center, Jerusalem, Israel, affiliated to the Hebrew University, Jerusalem, Israel.

Lens coloboma is a developmental defect resulting from abnormalities of the zonules and ciliary body. It may present as an isolated pathology or be accompanied by anomalies in different ocular structures. We report the case of a 20-year-old man referred for evaluation of anisometropic amblyopia in the right eye. Read More

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Ocular Anatomical and Functional Characteristics in Anisometropic Chinese Children.

Optom Vis Sci 2021 05;98(5):476-482

Department of Computer Science and Engineering, Southern University of Science and Technology, Shenzhen, China.

Significance: This research found that anterior and posterior biometrics differ in many aspects between fellow eyes of anisometropic children. This might shed light on the mechanisms underlying the onset and progression of anisometropia and myopia.

Purpose: This study aimed to investigate the ocular biometric parameters, peripheral refraction, and accommodative lag of fellow eyes in anisometropic children. Read More

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Slowing Down Myopia Progression with Contact Lenses - Everyday Cases from the Clinic.

Klin Monbl Augenheilkd 2021 Apr 30;238(4):437-442. Epub 2021 Apr 30.

Ophthalmology, Universitätsspital Basel Augenklinik, Basel, Switzerland.

Background: An estimated 49.8% of the world population will be myopic by 2050. Multifocal contact lenses (MFCLs) and orthokeratology (OK) reduce peripheral retinal hyperopic defocus, which animal studies have shown to positively impact eye growth. Read More

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Two-step keratoplasty for deep vascularized corneal opacity with severe peripheral thinning following Acanthamoeba keratitis.

Graefes Arch Clin Exp Ophthalmol 2021 Apr 27. Epub 2021 Apr 27.

Cornea and Ocular Surface Unit, San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy.

Purpose: In cases of corneal opacity with vascularization and peripheral thinning, traditional keratoplasty techniques have several risks and drawbacks. We report the results of a two-step surgical strategy consisting in performing a large diameter tectonic lamellar keratoplasty (TLK) to restore appropriate corneal thickness and an avascular recipient bed, followed by central optical PK within the lamellar graft at a later date.

Methods: This single-institution study analyzes the results of 7 eyes of 7 patients who received PK after large diameter TLK. Read More

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CLEAR - Contact lens optics.

Cont Lens Anterior Eye 2021 Apr 25;44(2):220-239. Epub 2021 Mar 25.

Eurolens Research, Division of Pharmacy and Optometry, University of Manchester, UK.

The most fundamental aspect of a contact lens is its optics; the manner in which the refraction of light is managed to optimise vision to the clinical benefit of the lens wearer. This report presents contemporary information on the optical structure of the eye and the optical models employed to understand the correction of refractive error. The design, measurement and clinical assessment of spherical, aspheric, toric, multifocal and myopia control contact lenses are described. Read More

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Effect of axial length and anterior chamber depth on the peripheral refraction profile.

Int J Ophthalmol 2021 18;14(2):292-298. Epub 2021 Feb 18.

School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran 1616913111, Iran.

Aim: To evaluate the effect of axial length (AL) and anterior chamber depth (ACD) on peripheral refractive profile in myopic patients compared to emmetropic participants.

Methods: This cross-sectional study was conducted in right eyes of 58 participants of whom 38 were emmetropic and 20 were myopic. Central and peripheral refraction were measured at 10°, 20°, and 30° eccentricities in nasal and temporal fields using an open-field autorefractor. Read More

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February 2021

Inverting peripheral hyperopic defocus into myopic defocus among myopic schoolchildren using addition power of multifocal contact lens.

Saudi J Ophthalmol 2020 Apr-Jun;34(2):94-100. Epub 2020 Dec 28.

Optometry and Vision Science Programme, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur, Malaysia.

Purpose: The purpose was to determine the minimum near-addition power needed using Proclear multifocal D-Design contact lens (adds: +1.50 D, +2.50 D, +3. Read More

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December 2020

Relationship between peripheral refraction, axial lengths and parental myopia of young adult myopes.

J Optom 2021 Jan 30. Epub 2021 Jan 30.

Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.

Purpose: To determine the relationship between peripheral refraction at the horizontal retina, axial length and parental history of myopia between myopic adults who have positive parental myopia and those with negative parental myopia.

Methods: 69 males and 44 females in the age range of 18-25 years were assigned either a negative parental myopia (NPM) or positive parental myopia (PPM) group. In the corrected and uncorrected states, peripheral refractive error was measured up to 30° horizontally in 10° steps using an open field autorefractor. Read More

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January 2021

Central versus paracentral cone location and outcomes of accelerated cross-linking in keratoconus patients.

Eye (Lond) 2021 Jan 29. Epub 2021 Jan 29.

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

Purpose: To compare outcomes 1 year after accelerated cross-linking (CXL) between keratoconus eyes with central cones to those with paracentral cones.

Methods: In this post hoc analysis of data from a prospective multicentre study, consecutive progressive keratoconus eyes treated with accelerated CXL were included. Preoperative and 1 year post CXL manifest refraction, corneal cylinder, maximal keratometry (Kmax), central corneal thickness and coma were assessed. Read More

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January 2021

Comparison of Methods for Estimating Retinal Shape: Peripheral Refraction vs. Optical Coherence Tomography.

J Clin Med 2021 Jan 6;10(2). Epub 2021 Jan 6.

Institute for Ophthalmic Research, University of Tübingen, 72076 Tübingen, Germany.

Retinal shape presents a clinical parameter of interest for myopia, and has commonly been inferred indirectly from peripheral refraction (PRX) profiles. Distortion-corrected optical coherence tomography (OCT) scans offer a new and direct possibility for retinal shape estimation. The current study compared retinal curvatures derived from OCT scans vs. Read More

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January 2021

Nasal-temporal asymmetry in peripheral refraction with an aspheric myopia control contact lens.

Biomed Opt Express 2020 Dec 1;11(12):7376-7394. Epub 2020 Dec 1.

Centre for Vision and Eye Research, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Queensland 4059, Australia.

A combination of human subject data and optical modelling was used to investigate unexpected nasal-temporal asymmetry in peripheral refraction with an aspheric myopia control lens. Peripheral refraction was measured with an auto-refractor and an aberrometer. Peripheral refraction with the lens was highly dependent upon instrument and method (e. Read More

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December 2020

Effect of cataract surgery on quality of life for patients with severe vision impairment due to age-related macular degeneration.

Ann Transl Med 2020 Nov;8(22):1543

Helsinki Retina Research Group, University of Helsinki, Helsinki, Finland.

Background: To determine whether patients with severe vision impairment due to advanced age-related macular degeneration (AMD) benefit from bilateral cataract surgery in terms of vision-related quality of life (QoL).

Methods: A prospective interventional single-center study. Ten patients with severe vision impairment due to advanced bilateral AMD were included. Read More

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November 2020

Power profiles of centre-distance multifocal soft contact lenses.

Ophthalmic Physiol Opt 2021 03 8;41(2):393-400. Epub 2020 Dec 8.

The Ocular Surface Institute, University of Houston College of Optometry, Houston, USA.

Purpose: Centre-distance multifocal contact lenses (MFCLs) for myopia control are thought to slow myopia progression by providing both clear foveal vision and myopic defocus. Characterising the power profile of lenses is important to understanding their possible effects on retinal defocus when worn. The power profiles of three commercially available MFCLs were determined. Read More

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Correction of Moderate to High Hyperopia With Implantation of an Allogeneic Refractive Lenticule.

J Refract Surg 2020 Nov;36(11):772-779

Purpose: To describe the visual outcomes of correcting moderate to high hyperopia after two different surgical procedures of lenticular implantation.

Methods: This prospective small case series study used epikeratophakia combined with transepithelial phototherapeutic keratectomy (PTK-EP) and femtosecond laser-assisted lenticule intrastromal keratoplasty (LIKE) using myopic small incision lenticule extraction (SMILE)-derived refractive lenticule for correcting hyperopia ranging from +3.00 to +10. Read More

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November 2020

Refractive outcomes following cataract combined with lamellar keratoplasty: femtosecond-DSEK versus microkeratome-DSAEK.

Int Ophthalmol 2021 Feb 22;41(2):639-647. Epub 2020 Oct 22.

S. Fyodorov Eye Microsurgery State Institution, Moscow, Russia.

Purpose: Prediction of postoperative refraction following posterior lamellar keratoplasty is crucial for choosing proper intraocular lens power in combined surgeries. Femtosecond laser-assisted Descemet stripping endothelial keratoplasty (FS-DSEK) creates thin, planar grafts while microkeratome-assisted Descemet's stripping automated endothelial keratoplasty (DSAEK) creates non-planar, concaved grafts. We evaluated whether this fundamental difference affects the refractive outcomes in cataract surgery combined with FS-DSEK compared to cataract surgery combined with microkeratome-assisted DSAEK. Read More

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February 2021

Two-dimensional peripheral refraction and retinal image quality in orthokeratology lens wearers.

Biomed Opt Express 2020 Jul 4;11(7):3523-3533. Epub 2020 Jun 4.

Aier School of Ophthalmology, Central South University, Changsha, China.

Orthokeratology (O-K) is a common procedure that uses rigid contact lenses to reshape the cornea while worn overnight. Beyond the correction of refractive error, it has been suggested that this approach can also be used to reduce myopia progression, possibly because it induces changes in peripheral optics. As this hypothesis remains unproven, the aim of the present study was to explore changes in peripheral retinal optical quality in a group of myopic children following O-K treatment. Read More

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Clinical Outcome of Hybrid Contact Lenses in Keratoconus.

Eye Contact Lens 2021 May;47(5):283-287

Department of Ophthalmology (D.K., C.K.), Antwerp University Hospital, Antwerp, Belgium; Department of Ophthalmology (D.K., C.K., E.O.K.), Faculty of Medical Sciences, University of Antwerp, Antwerp, Belgium; Department of Ophthalmology (E.O.K.), Ghent University Hospital, Ghent, Belgium; and Department of Ophthalmology (E.O.K.), Faculty of Medical Sciences, Ghent University, Ghent, Belgium.

Objectives: To report the clinical outcome of hybrid contact lens fitting in keratoconus.

Methods: A retrospective chart review was performed of keratoconus patients who had been fitted with hybrid contact lenses in one or both eyes. Patients with a history of previous intraocular surgery (except for corneal crosslinking) and relevant concurrent ocular disease limiting visual outcome were excluded. Read More

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Vertebrae Destruction with Cauda Equina Syndrome Secondary to Spinal Gouty Arthritis: A Case Report.

Malays Orthop J 2020 Jul;14(2):141-144

Department of Orthopaedics and Traumatology, Hospital Sungai Buloh, Sungai Buloh, Malaysia.

Gouty arthritis commonly affects peripheral joints and is associated with hyperuricaemia. Spinal manifestations of gouty arthritis are not common, and majority of published articles worldwide were case reports. This is a case report of spinal gouty arthritis that presented with spinal vertebrae destruction and cauda equina syndrome. Read More

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Inflammatory-induced astigmatism: acute changes in corneal curvature secondary to marginal keratitis and previous mitomycin-C treatment.

J Cataract Refract Surg 2020 12;46(12):e54-e56

From the Department of Ophthalmology, University of Auckland, Auckland, and the Department of Ophthalmology, Waikato Hospital, Hamilton, New Zealand.

A 52-year-old man presented with left eye redness, blurred vision, and photophobia. A history included marginal keratitis and conjunctival squamous cell carcinoma treated with excision and topical mitomycin-C. Examination revealed current marginal keratitis, managed with topical antibiotic and corticosteroid. Read More

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December 2020

Manipulation of Front-Surface Profile of Scleral Contact Lenses to Alter Peripheral Refraction.

Optom Vis Sci 2020 09;97(9):797-806

School of Optometry and Vision Science, University of New South Wales, Sydney, Australia.

Significance: The front optic zone diameter of scleral contact lenses was manipulated to mimic the central treatment zone induced by orthokeratology contact lens wear, to explore potential effects on the peripheral refraction profile.

Purpose: The purpose of this study was to investigate effects on the peripheral refraction profile of changing front optic zone diameters of scleral contact lenses.

Methods: Twelve young adults were fitted with scleral contact lenses (diameter, 16. Read More

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September 2020

Efficacy and safety of intravitreal bevacizumab for the treatment of retinopathy of prematurity: a single-center retrospective review.

J Matern Fetal Neonatal Med 2020 Sep 15:1-6. Epub 2020 Sep 15.

Eye Clinic, Neuromuscular and Sense Organs Department, Careggi University Hospital, Florence, Italy.

Purpose: The aim of this study is to report our experience in the management of type 1 retinopathy of prematurity (ROP) or aggressive posterior retinopathy of prematurity (APROP) in premature infants, who received intravitreal bevacizumab (IVB) injections either as first-line monotherapy or as rescue therapy following laser therapy.

Methods: Single-center retrospective study on 37 patients (74 eyes) affected by sight-threatening ROP that underwent treatment either with IVB alone or laser photocoagulation followed by IVB at the Neonatal Intensive Care Unit of Careggi University Hospital of Florence, between 2008 and 2015.

Results: Seventeen patients were males (45. Read More

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September 2020

Cloudy complication: management of an opacified intraocular lens and diffuse iris transillumination defects: August consultation #1.

Authors:

J Cataract Refract Surg 2020 08;46(8):1202

A 76-year-old man with a medical history of type 2 diabetes, hypercholesterolemia, and coronary artery disease presented with blurred vision in the right eye. His ocular history was significant for cataract surgery with posterior chamber intraocular lens (PC IOL) implantation in both eyes 3 years prior to presentation. His specific ocular complaints included blurred vision, whiteout visual episodes lasting 20 minutes, and intractable glare in the right eye. Read More

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A Novel Device for Smartphone-Based Fundus Imaging and Documentation in Clinical Practice: Comparative Image Analysis Study.

JMIR Mhealth Uhealth 2020 07 29;8(7):e17480. Epub 2020 Jul 29.

Department of Ophthalmology, University Hospital Bonn, Bonn, Germany.

Background: Smartphone-based fundus imaging allows for mobile and inexpensive fundus examination with the potential to revolutionize eye care, particularly in lower-resource settings. However, most smartphone-based fundus imaging adapters convey image quality not comparable to conventional fundus imaging.

Objective: The purpose of this study was to evaluate a novel smartphone-based fundus imaging device for documentation of a variety of retinal/vitreous pathologies in a patient sample with wide refraction and age ranges. Read More

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