38,978 results match your criteria refractive error


A realist evaluation of the implementation of a large-scale school eye health programme in India: a qualitative study.

Ophthalmic Physiol Opt 2021 Apr 16. Epub 2021 Apr 16.

The University of New South Wales, Sydney, New South Wales, Australia.

Purpose: This study investigates how and in what circumstances a school-based eye health programme, the Refractive Errors Among CHildren (REACH) programme, achieved its desired outcomes: accessibility, standards of refractive care, fidelity and availability of comprehensive services, for over 2 million school children in six districts across India.

Methods: We conducted a realist evaluation to identify programme aspects and their causal relationships with outcomes. Deductive and inductive thematic analysis of qualitative data included three phases: 1. Read More

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Normal Ocular Protrusion Values in South Indian Population and Effect of Age, Gender and Refractive Status on Ocular Protrusion.

Clin Ophthalmol 2021 9;15:1445-1451. Epub 2021 Apr 9.

Department of Optometry, College of Applied Medical Sciences, Qassim University, Buraidah, Saudi Arabia.

Aim: To determine the absolute and relative ocular protrusion values in normal south Indian population, and its relation to age, gender and type of refractive error.

Methods: A total of 387 subjects aged 7-70 years were included in this study. Both right and left absolute ocular protrusion values were measured by a single physician using Luedde exophthalmometer in primary gaze. Read More

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Establishing Prediction Intervals for the SpeedWheel Acuity Test in Adults and Children.

Klin Monbl Augenheilkd 2021 Apr 14. Epub 2021 Apr 14.

Ophthalmology, Universitätsspital Basel Augenklinik, Basel, Switzerland.

Background: The SpeedWheel (SW) test is an objective test of visual acuity (VA) using suppression of the optokinetic nystagmus (OKN). Here, we established prediction intervals of the SW measures compared to Snellen acuity in adults and children.

Subjects And Methods: In this prospective, single center study, subjects aged at least 4 years underwent testing of VA with SW, Landolt-C, and Tumbling-E symbols (Freiburg acuity test: FrACT-C, FrACT-E). Read More

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Visual and Ocular Conditions among a Homeless Adult Population of Boston.

Optom Vis Sci 2021 Apr;98(4):362-366

Department of Primary Care, New England College of Optometry, Boston, Massachusetts.

Significance: The eye care needs of the homeless population in the United States are not well known. This study elucidates those needs for health care for the homeless programs and eye care practitioners. This information could result in an increase in the provision of necessary eye care services. Read More

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Perifoveal Chorioretinal Atrophy following Subretinal Voretigene Neparvovec-rzyl for RPE65-mediated Leber Congenital Amaurosis.

Ophthalmol Retina 2021 Apr 7. Epub 2021 Apr 7.

The Vision Center, Department of Surgery, Children's Hospital Los Angeles, Los Angeles, CA;; Roski Eye Institute, Department of Ophthalmology, Keck School of Medicine, University of Southern California, Los Angeles, CA. Electronic address:

Purpose: To report an anatomic change observed in a series of patients who underwent subretinal injection of voretigene neparvovec-rzyl (VN) for RPE65-mediated Leber congenital amaurosis.

Design: Multi-center retrospective chart review.

Participants: Patients who underwent subretinal VN injection at each of four participating institutions. Read More

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[Refractive surgery for hyperopia].

J Fr Ophtalmol 2021 Apr 6. 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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Hand-Held Nidek versus Table-Mounted Huvitz Autorefractors and Their Agreement with Subjective Refraction in Adults.

Clin Ophthalmol 2021 1;15:1391-1401. Epub 2021 Apr 1.

The Department of Ophthalmology, Sohag Faculty of Medicine, Sohag University, Sohag, Egypt.

Objective: To compare the agreement between commercially available table mounted and a hand-held autorefractors and their agreement with subjective refraction. The effect of different body position with the handheld autorefractometer was also evaluated.

Methods: A prospective study was performed on 253 healthy eyes. Read More

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Amblyopia.

Authors:
Dennis M Levi

Handb Clin Neurol 2021 ;178:13-30

School of Optometry & Helen Wills Neuroscience Institute, University of California Berkeley, Berkeley, CA, United States. Electronic address:

Amblyopia is a neurodevelopmental abnormality that results in physiological alterations in the visual pathways and impaired vision in one eye, less commonly in both. It reflects a broad range of neural, perceptual, oculomotor, and clinical abnormalities that can occur when normal visual development is disrupted early in life. Aside from refractive error, amblyopia is the most common cause of vision loss in infants and young children. Read More

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January 2021

Ophthalmologic manifestations of adult patients with cystic fibrosis.

Eur J Ophthalmol 2021 Apr 8:11206721211008780. Epub 2021 Apr 8.

First Department of Ophthalmology, G. Gennimatas General Hospital, National and Kapodistrian University of Athens, Athens, Greece.

Introduction: Cystic fibrosis (CF) is the most common life-shortening recessive genetic disease in Caucasians, affecting primarily the lungs. The objective of our study was to investigate potential ophthalmologic involvement in adult patients with CF.

Methods: Fifty adult patients with cystic fibrosis and 60 age- and sex-matched controls underwent complete ophthalmologic examination including tear-film Break-Up Time (BUT), Macular Thickness, and peripapillary Retinal Nerve Fiber Layer (pRNFL) thickness measurements using Spectral Domain-OCT. Read More

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Comparison of outcomes of laser refractive surgery (LRS) alone and LRS with laser asymmetric keratectomy in patients with myopia: A retrospective study.

Medicine (Baltimore) 2021 Apr;100(14):e25366

Woori Eye Clinic, Seo-Ku Daejon, Republic of Korea.

Abstract: To compare and analyze the postoperative 1-year outcomes of laser refractive surgery (LRS) alone vs LRS with laser asymmetric keratectomy (LAK), in patients with myopia, for preventing and resolving LRS complications.This retrospective study compared the preoperative and 1-year postoperative outcomes between the control and comparison groups using a sum of deviations in corneal thickness in 4 directions >80 μm. The control group included 41 patients with myopia (41 eyes) who underwent LRS. Read More

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The effects of peripheral anterior synechiae on refractive outcomes after cataract surgery in eyes with primary angle-closure disease.

Medicine (Baltimore) 2021 Apr;100(14):e24673

Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.

Abstract: Objective of the study was to investigate the effects of peripheral anterior synechiae (PAS) on refractive outcomes after cataract surgery in eyes with primary angle-closure disease (PACD).This is a retrospective, cross-sectional study. Seventy eyes of 70 PACD patients who underwent phacoemulsification and intraocular lens implantation. Read More

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[The safety of atropine for myopia prevention and control].

Authors:
D X Chen X G He X Xu

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):299-304

Shanghai Eye Disease Prevention and Treatment Center, Shanghai Eye Hospital, Shanghai Vision Health Center & Shanghai Children Myopia Institute, Division of Ophthalmology Shanghai General Hospital, Shanghai Jiao Tong University, National Clinical Research Center for Eye Diseases, Shanghai 200040, China.

Atropine is a classical drug with a wide use in clinical practice. In ophthalmology, atropine can be used for cycloplegia before optometry, and the treatment of amblyopia, iridocyclitis, malignant glaucoma, etc. In recent years, the "old drugs with new application " research and application of atropine for myopia prevention and control has become a hotspot and the efficacy of atropine has been preliminarily recognized. Read More

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[The effect of extended depth of focus contact lenses on the accommodation of presbyopic eyes].

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):292-296

Hainan Eye Hospital and Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Haikou 570311, China.

To evaluate the effect of extended depth of focus contact lenses on the accommodation of presbyopic eyes. It was a double-blind randomized controlled trial. Thirty eyes of 30 emmetropic volunteers (15 males, 15 females) who were staff or family members of Hainan Eye Hospital, aged (49. Read More

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[Regulation of bFGF and TGF-β2 in human scleral fibroblasts by the lumican gene mutation associated with myopia].

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):277-283

Beijing Tongren Eye Center, Beijing Tongren Hospital of Capital Medical University, Beijing Key Laboratory of Ophthalmology & Visual Sciences, Beijing 100730, China.

To investigate the regulation of basic fibroblast growth factor (bFGF) and transforming growth factor (TGF)-β2 in human scleral fibroblasts (HSFs) by the adenovirus-mediated Lumican gene mutation, and to illustrate the effect of this mutation on myopia. Experimental study. The HSFs were isolated and cultured from human scleral tissues. Read More

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[Corneal nerve repair and optical density in patients with high myopia after three kinds of corneal refractive surgery].

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):268-276

Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, China.

To investigate the repair of subepithelial nerve fibers in different areas of the cornea and the difference of corneal transparency 12 months after small incision lenticule extraction (SMILE), femtosecond laser in situ keratomileusis (FS-LASIK) and excimer laser in situ keratomileusis (LASEK) in high myopia. A cohort study. From June 2018 to October 2019, 30 patients with high myopia (60 eyes) were selected for corneal refractive surgery in the Department of Ophthalmology, Affiliated Hospital of Qingdao University, including 16 females (32 eyes) and 14 males (28 eyes). Read More

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[Forcasting the prevalence of myopia among students aged 6-18 years in China from 2021 to 2030].

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):261-267

Shanghai Eye Disease Prevention and Treatment Center, Shanghai Eye Hospital, Shanghai Vision Health Center & Shanghai Children Myopia Institute, Division of Ophthalmology Shanghai General Hospital, Shanghai Jiao Tong University, National Clinical Research Center for Eye Diseases, Shanghai 200040, China.

To predict the prevalence of myopia among Chinese students aged 6-18 years under different intervention scenarios from 2021 to 2030. The multi-state Markov model was developed based on the transition process of study stages and myopia statuses. The development of myopia was simplified into two statuses: non-myopia and myopia. Read More

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[Epidemiology of myopia: iteration and progression].

Authors:
F Lyu Y Y Chen

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):245-250

Eye Hospital, Wenzhou Medical University, Wenzhou 325000, China.

Adolescent myopia has become one of the researchers' focuses among visual problems around the world. Carrying out a scientific and efficient epidemiological study on myopia is an essential basis for discovering the rules of the occurrence and the development of myopia, exploring related influencing factors and identifying the mechanisms, which are critical for the policy-making for myopia control. The epidemiological studies of myopia at home and abroad have a long history of exploration, standardization and unification, and are enriched by new technologies and up-to-date discoveries. Read More

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[The key points and difficulties in prevention of myopia in Chinese children and adolescents].

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):241-244

Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Ophthalmology, Beijing Key Laboratory of Ophthalmology & Visual Sciences, Beijing 100730, China.

Myopia has emerged as a public health problem with its increasing prevalence in children and adolescents in China. The Chinese government has begun to take action to address this issue in recent years. In 2018, the Implementation Plan of the Myopia Prevention and Control for Children and Adolescents was issued by the Ministry of Education and other seven ministries and commissions. Read More

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Evaluation of Shared Genetic Susceptibility to High and Low Myopia and Hyperopia.

JAMA Ophthalmol 2021 Apr 8. Epub 2021 Apr 8.

Cardiff University School of Optometry and Vision Sciences, Cardiff, United Kingdom.

Importance: Uncertainty currently exists about whether the same genetic variants are associated with susceptibility to low myopia (LM) and high myopia (HM) and to myopia and hyperopia. Addressing this question is fundamental to understanding the genetics of refractive error and has clinical relevance for genotype-based prediction of children at risk for HM and for identification of new therapeutic targets.

Objective: To assess whether a common set of genetic variants are associated with susceptibility to HM, LM, and hyperopia. Read More

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Myopia and glaucoma progression among patients with juvenile onset open angle glaucoma: A retrospective follow up study.

Ophthalmic Physiol Opt 2021 Apr 7. Epub 2021 Apr 7.

Glaucoma Services, Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.

Objective: To identify the risk factors for glaucoma progression, especially the association with myopia, among treated juvenile open angle glaucoma (JOAG) patients.

Methods: Glaucomatous progression was analysed in the eyes of JOAG patients with at least 5-years of follow up in this retrospective study. Baseline variables such as age, inheritance pattern, baseline intraocular pressure (IOP), baseline central corneal thickness, visual acuity, baseline refractive error, spherical equivalent (SE) and duration of follow-up were noted. Read More

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Seeing beyond 2020: what next for refractive error care?

Ophthalmic Physiol Opt 2021 Apr 7. Epub 2021 Apr 7.

School of Optometry, Aston University, Birmingham, UK.

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Refractive outcome of trocar-assisted sutureless scleral fixation with 3-piece intraocular lenses.

Int Ophthalmol 2021 Apr 7. Epub 2021 Apr 7.

Department of Ophthalmology, Faculty of Medicine, Goztepe Training and Research Hospital, Istanbul Medeniyet University, Kadikoy, Istanbul, Turkey.

Purpose: Intraocular lens (IOL) implantation with a trocar-assisted sutureless scleral fixation technique is a relatively new IOL implantation approach for aphakic eyes. During this surgery, the intrascleral position of the haptics can change the location of the IOL optic and may alter the refractive outcome. This study aimed to evaluate the refractive outcome of this surgery. Read More

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Mandated Kindergarten Eye Examinations in a US Suburban Clinic: Is It Worth the Cost?

Clin Ophthalmol 2021 29;15:1331-1337. Epub 2021 Mar 29.

Wheaton Eye Clinic, Ltd., Wheaton, IL, USA.

Purpose: The state of Illinois has required an examination by an optometrist or ophthalmologist prior to mandatory kindergarten since 2008. This requirement has allowed us to gather information regarding disease prevalence in a local suburban population.

Methods: A retrospective chart review was undertaken of kindergarten eye examinations performed at the Wheaton Eye Clinic between September 2008 and February 2017. Read More

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Clinic-based eye disease screening employing non-expert fundus photo-graders at the point of screening: diagnostic validity and yield.

Am J Ophthalmol 2021 Apr 3. Epub 2021 Apr 3.

Francis I. Proctor Foundation, University of California San Francisco, San Francisco, CA, USA; Department of Ophthalmology, University of California, San Francisco, San Francisco, CA, USA. Electronic address:

Purpose: to determine the diagnostic accuracy of several diagnostic tests for AMD, DR, glaucoma, and cataract, as well as the proportion with eye disease from each of three enrolling clinics.

Design: Diagnostic accuracy study.

Methods: Patients ≥ 50 years of age in a diabetes, thyroid, and general medicine clinic were screened with visual acuity, tonometry, and fundus photography. Read More

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Health system strengthening for vision care in The Gambia.

Rural Remote Health 2021 Apr 6;21(2):6245. Epub 2021 Apr 6.

OneSight, 4000 Luxottica Place, Mason, OH 45040, USA

Introduction: According to global estimates, 39 million people are blind and 285 million are at risk of severe vision loss, with a significant portion of this burden in Sub-Saharan Africa. Some African nations like The Gambia are beginning to tackle vision impairment by addressing the problem through a health system lens.

Methods: A health system framework, focusing on system areas of leadership and governance, resources for vision care, and vision care access, was used to understand and analyze how The Gambia has increased access to vision care using a public-private pilot partnership. Read More

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Correction of Low-Moderate Hyperopia Improves Accommodative Function for Some Hyperopic Children During Sustained Near Work.

Invest Ophthalmol Vis Sci 2021 Apr;62(4)

Centre for Optometry and Vision Science, Biomedical Sciences Research Institute, Ulster University, Coleraine, United Kingdom.

Purpose: This study investigated whether refractive correction improved accommodative function of hyperopic children while engaged in two sustained near activities.

Methods: Sustained accommodative function of 63 participants (aged 5-10 years) with varying levels of uncorrected hyperopia (>/= +1.00 D and < + 5. Read More

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Effect of convergent beam array on reducing scintillation in underwater wireless optical communications with pointing errors.

Opt Express 2021 Mar;29(7):9846-9860

In this paper, we propose the convergent beam array to reduce scintillation induced by oceanic turbulence in underwater wireless optical communications (UWOCs) between misaligned transceivers. In the proposed convergent beam array, the propagation directions of beams are slanted inwards and different from each other. First, we present the convergent beam array system and analyze spatial relationships between the transmitter and the individual beam in beam array systems. Read More

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To compare on-axis measurements of the axial length with off-axis measurements in the paracentral horizontal and vertical positions.

Semin Ophthalmol 2021 Apr 4:1-4. Epub 2021 Apr 4.

Department of Basic Sciences, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

: To compare on-axis measurements of the axial length (AL) with off-axis measurements in the paracentral horizontal and vertical positions using the Lenstar LS 900 biometer.: In this, the samples were selected from patients scheduled for cataract surgery using a systematic randomization method. After applying the exclusion criteria, all subjects underwent optometric examinations and AL measurement using the Lenstar. Read More

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Effect of the capsular tension ring on refractive outcome after phacoemulsification.

Rom J Ophthalmol 2021 Jan-Mar;65(1):59-63

Department of Ophthalmology, Kutahya Health Sciences University School of Medicine, Kutahya, Turkey.

To evaluate how capsular tension rings (CTR) affect refractive outcomes following cataract extraction by phacoemulsification complicated by zonular instability. Retrospective. In a retrospective case-control study, the 29 eyes of 29 patients with CTRs were compared with the 29 eyes of patients without zonular instability following routine phacoemulsification, with mean arithmetic refractive prediction error (ArRPE) and mean absolute refractive prediction error (AbRPE) as primary outcome measures. Read More

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Early therapeutic lamellar keratoplasty for acanthamoeba keratitis followed by implantable Collamer lens for visual rehabilitation.

Middle East Afr J Ophthalmol 2020 Oct-Dec;27(4):244-246. Epub 2021 Jan 19.

Department of Ophthalmology, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia.

We are reporting the case of a 25-year-old female who developed acanthamoeba keratitis after wearing contact lenses for high myopia. She was diagnosed as acanthamoeba and started the treatment of antiacanthamoeba for 3 consecutive weeks, followed by bare Descemet's therapeutic lamellar keratoplasty (LKP) with the maintenance of antiacanthamoeba treatment to control the infection. In the late postoperative period, visual rehabilitation was obtained by insertion of implantable Collamer lens (ICL) with her final visual outcome was 20/30. Read More

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January 2021