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https://www.readbyqxmd.com/read/29785988/accuracy-of-noncycloplegic-refraction-performed-at-school-screening-camps
#1
Rolli Khurana, Shailja Tibrewal, Suma Ganesh, Rajoo Tarkar, Phuong Thi Thanh Nguyen, Zeeshan Siddiqui, Shantanu Dasgupta
Purpose: The aim of this study was to compare noncycloplegic refraction performed in school camp with that performed in eye clinic in children aged 6-16 years. Methods: A prospective study of children with unaided vision <0.2 LogMAR who underwent noncycloplegic retinoscopy (NCR) and subjective refraction (SR) in camp and subsequently in eye clinic between February and March 2017 was performed. A masked optometrist performed refractions in both settings. The agreement between refraction values obtained at both settings was compared using the Bland-Altman analysis...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29780931/case-of-progressive-hyperopia-due-to-flattening-of-cornea
#2
Hiromasa Hirai, Shinji Maruoka, Tadanobu Yoshikawa, Nahoko Ogata
Purpose: To report a case that had a progressive decrease in the visual acuity caused by a progressive increase in the hyperopia due to a flattening of the cornea. Observations: A 50-year-old woman complained of decreased vision in both eyes. Her decimal best-corrected visual acuity was 1.2 in the right and 0.5 in the left eyes, and the refractive error (spherical equivalent) was +3.75 diopters (D) for the right eye and +6.5 D for the left eye. Slit-lamp examinations showed clear corneas but Descemet's folds and fine pigmentations and opacities were present beneath the corneal epithelium in both eyes...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29777045/ten-year-incidence-of-primary-angle-closure-in-elderly-chinese-the-liwan-eye-study
#3
Lanhua Wang, Wenyong Huang, Shengsong Huang, Jian Zhang, Xinxing Guo, David S Friedman, Paul J Foster, Mingguang He
PURPOSE: To determine the 10-year incidence of all forms of primary angle closure (PAC) in phakic eyes and its risk factors in an urban Chinese population aged 50 years and older. METHODS: Survivors of 1405 baseline participants were invited to attend the 10-year follow-up visit in the Liwan Eye Study. Participants with established baseline angle closure, including primary angle closure suspects (PACS), PAC and primary angle closure glaucoma (PACG), or those who underwent bilateral cataract surgery during the 10-year period, as well as those who did not tolerate gonioscopic examinations, were excluded from this analysis...
May 18, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29771894/-axial-ametropias-of-very-high-degree
#4
A A Shpak
To characterize a complex of disorders developing in patients with extreme values of anteroposterior axis of the eye, it is necessary to create an appropriate nomenclature. As a topic for discussion, authors suggest to supplement the existing classifications of myopia and hyperopia with 'character of ametropia' section (axial, refractive, mixed) and the definition of ametropias of very high (ultra-high/extreme) degree (a criterion for myopia is: <-10 D). In prospect, classification of such ametropias should be based on the length of the anteroposterior axis of the eye...
2018: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29771882/-morphological-changes-of-cornea-in-children-with-hyperopia-in-the-immediate-and-remote-postoperative-period-after-laser-keratomieleusis-according-to-confocal-microscopy-data
#5
I L Kulikova, N P Pashtaev, O V Shlenskaya
Studying morphological changes of cornea in the remote postoperative period is becoming increasingly relevant with refractive surgeries being adapted for children. PURPOSE: comparative analysis of keratocyte density and hystomorphologic changes of cornea after laser in situ keratomieleusis (LASIK) and femtosecond laser-assisted LASIK (FS-LASIK) in children with hyperopia. MATERIAL AND METHODS: 109 patients aged 6-17 years in 2 groups were examined with 'Confoscan-4' confocal microscope...
2018: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29732344/a-quantitative-investigation-on-the-effect-of-edge-enhancement-for-improving-visual-acuity-at-different-levels-of-contrast
#6
S Nabavi, A Mehri Dehnavi, A Vard, S Mohammad Pour
Background: The major limitation in human vision is refractive error. Auxiliary equipment and methods for these people are not always available. In addition, limited range of accommodation in adult people when switching from a far point to a near point is not simply possible. In this paper, we are looking for solutions to use the facilities of digital image processing and displaying to improve visual acuity when using digital display devices. We quantitatively investigate the effect of edge enhancement on improving the visual acuity at different levels of contrast...
March 2018: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/29703284/evaluation-of-a-multifunctional-femtosecond-laser-for-the-creation-of-laser-in-situ-keratomileusis-flaps
#7
Stephen Slade, Teresa Ignacio, Scott Spector
PURPOSE: To characterize the performance of a multifunctional femtosecond laser system (Lensx) for the creation of laser in situ keratomileusis (LASIK) flaps. SETTING: Two surgical sites in the United States. DESIGN: Prospective case series pilot study. METHODS: Patients with myopia or hyperopia who were eligible for femtosecond laser-initiated LASIK surgery with corrected distance visual acuities (CDVA) correctable to at least 20/25 were enrolled...
March 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29692930/refraction-and-ocular-biometry-of-preschool-children-in-shanghai-china
#8
Luoli Zhang, Xiangui He, Xiaomei Qu, Xiaofang You, Bingjie Wang, Huijing Shi, Hui Tan, Haidong Zou, Jianfeng Zhu
Purpose: To investigate the refraction and ocular biometry characteristics and to examine the prevalence of refractive errors in preschool children aged 3 to 6 years in Shanghai, China. Methods: A school-based cross-sectional study was conducted in Jiading and Xuhui District, Shanghai, in 2013. We randomly selected 7 kindergartens in Jiading District and 10 kindergartens in Xuhui District, with a probability proportionate to size. The children underwent comprehensive eye examinations, including cycloplegic refraction and biometric measurements...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29691920/schlemm-s-canal-and-trabecular-meshwork-morphology-in-high-myopia
#9
Zhiqi Chen, Yinwei Song, Mu Li, Wei Chen, Shiliang Liu, Zhen Cai, Liugui Chen, Yan Xiang, Hong Zhang, Junming Wang
PURPOSE: Myopes have a higher risk for open-angle glaucoma; however, the reason is not clear. This study aims to explore the morphologic alterations of Schlemm's canal and trabecular meshwork size in highly myopic eyes. METHODS: Forty myopic eyes from 40 patients with high myopia and 40 control eyes from 40 subjects with low myopia, emmetropia or low hyperopia were enrolled. Optical coherence tomography (OCT) was used to image Schlemm's canal and trabecular meshwork size...
May 2018: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/29685778/multifocal-intraocular-lens-implantation-after-previous-hyperopic-corneal-refractive-laser-surgery
#10
Violette Vrijman, Jan Willem van der Linden, Ivanka J E van der Meulen, Maarten P Mourits, Ruth Lapid-Gortzak
PURPOSE: To describe the outcomes in terms of the refraction and visual acuity of multifocal intraocular lens (IOL) implantation in patients with previous hyperopic corneal refractive laser surgery. SETTING: Academic Medical Center, University of Amsterdam, Amsterdam, and Retina Total Eye Care, Driebergen, the Netherlands. DESIGN: Retrospective case series. METHODS: Results were analyzed 3 months after implantation of a multifocal IOL (Acrysof Restor SN6AD1) in patients after previous corneal refractive laser surgery for hyperopia...
April 20, 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29683519/children-with-mucopolysaccharidosis-risk-progressive-visual-dysfunction-despite-haematopoietic-stem-cell-transplants
#11
Kristina Teär Fahnehjelm, Monica Olsson, Enping Chen, Jürg Hengstler, Karin Naess, Jacek Winiarski
AIM: This prospective study assessed the long-term ocular and visual outcomes of children with mucopolysaccharidoses type I Hurler syndrome (MPS IH) who were treated with haematopoietic stem cell transplants (HSCT). METHODS: Clinical ophthalmological assessments were performed on eight patients at the St Erik Eye Hospital, Stockholm, Sweden, from 2001-2018: The median age at diagnosis and HSCT were 12.2 (range 5.0-16.4) and 16.7 (8.0-20.4) months. The last eye examination was at a median of 13...
April 23, 2018: Acta Paediatrica
https://www.readbyqxmd.com/read/29682791/prevalence-of-refractive-errors-in-children-in-india-a-systematic-review
#12
REVIEW
Sethu Sheeladevi, Bharani Seelam, Phanindra B Nukella, Aditi Modi, Rahul Ali, Lisa Keay
Uncorrected refractive error is an avoidable cause of visual impairment which affects children in India. The objective of this review is to estimate the prevalence of refractive errors in children ≤ 15 years of age. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed in this review. A detailed literature search was performed to include all population and school-based studies published from India between January 1990 and January 2017, using the Cochrane Library, Medline and Embase...
April 22, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29676308/correlation-between-dry-eye-and-refractive-error-in-saudi-young-adults-using-noninvasive-keratograph-4
#13
Rania M Fahmy, Amal Aldarwesh
Purpose: The purpose is to study the correlation between dry eye and refractive errors in young adults using noninvasive Keratograph. Methods: In this cross sectional study, a total of 126 participants in the age range of 19-25 years and who were free of ocular surface disease, were recruited from King Saud University Campus. Refraction was defined by the spherical equivalent (SE) as the following: 49 emmetropic eyes (±0.50 SE), 48 myopic eyes (≤-0.75 SE and above), and 31 hyperopic eyes (>+0...
May 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29675275/effect-of-altered-retinal-cones-opsins-on-refractive-development-under-monochromatic-lights-in-guinea-pigs
#14
Leilei Zou, Xiaoyu Zhu, Rui Liu, Fei Ma, Manrong Yu, Hong Liu, Jinhui Dai
Purpose: To analyze the changes of refraction and metabolism of the retinal cones under monochromatic lights in guinea pigs. Methods: Sixty guinea pigs were randomly divided into a short-wavelength light (SL) group, a middle-wavelength light (ML) group, and a white light (WL) group. Refraction and axial length were measured before and after 10-week illumination. The densities of S-cones and M-cones were determined by retinal cone immunocytochemistry, and the expressions of S-opsins and M-opsins were determined by real-time PCR and Western blot...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29669369/cataract-surgery-in-high-hyperopia
#15
Nicolas Philipp Waldmann, Nadine Gerber, Warren Hill, David Goldblum
BACKGROUND: Although cataract surgery is a well-established and standardised procedure, it can be demanding and associated with higher complication rates in high hyperopia. We present clinical data for highly hyperopic patients who underwent cataract surgery over a 12-year period (2005 - 2016) and at a single centre. PATIENTS AND METHODS: Out of a total of 11 434 cataract operations, 41 highly hyperopic eyes (SN60AT ≥ 31 dpt) were included for analysis...
April 2018: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29667435/clinical-and-surgical-risk-factors-for-consecutive-exotropia
#16
Sophie Bryselbout, Veronique Promelle, Florent Pracca, Solange Milazzo
INTRODUCTION: Consecutive exotropia is one of the complications of esotropia surgery. Its prevalence is estimated at 4%-27%. The aim of this study was to identify the risk factors for consecutive exotropia in the aftermath of surgical treatment of esotropia. METHODS: Seventy-four patients examined in our strabismus consultation for a consecutive exotropia from January 2010 to June 2016 were retrospectively included. The age of onset of esotropia, the presence of amblyopia, the age of esotropia surgery and chosen procedure, the refractive errors, the anomalies of ocular motility, the age of onset of the consecutive exotropia and its angle of deviation were reported...
April 1, 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29660392/prevalence-of-uncorrected-refractive-errors-among-school-age-children-in-the-school-district-of-philadelphia
#17
Eileen L Mayro, Lisa A Hark, Eric Shiuey, Michael Pond, Linda Siam, Tamara Hill-Bennett, Judie Tran, Nitasha Khanna, Marlee Silverstein, James Donaghy, Tingting Zhan, Ann P Murchison, Alex V Levin
PURPOSE: To determine the prevalence and severity of uncorrected refractive errors in school-age children attending Philadelphia public schools. METHODS: The Wills Eye Vision Screening Program for Children is a community-based pediatric vision screening program designed to detect and correct refractive errors and refer those with nonrefractive eye diseases for examination by a pediatric ophthalmologist. Between January 2014 and June 2016 the program screened 18,974 children in grades K-5 in Philadelphia public schools...
April 13, 2018: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/29655781/the-hyperopic-effect-of-narrow-band-long-wavelength-light-in-tree-shrews-increases-non-linearly-with-duration
#18
Alexander H Ward, Thomas T Norton, Carrie E Huisingh, Timothy J Gawne
During postnatal refractive development, an emmetropization mechanism uses refractive error to modulate the growth rate of the eye. Hyperopia (image focused behind the retina) produces what has been described as "GO" signaling that increases growth. Myopia (image focused in front of the retina) produces "STOP" signaling that slows growth. The interaction between GO and STOP conditions is non-linear; brief daily exposure to STOP counteracts long periods of GO. In young tree shrews, long-wavelength (red) light, presented 14 h per day, also appears to produce STOP signals...
April 12, 2018: Vision Research
https://www.readbyqxmd.com/read/29644238/mechanisms-of-optical-regression-following-corneal-laser-refractive-surgery-epithelial-and-stromal-responses
#19
REVIEW
Majid Moshirfar, Jordan D Desautels, Brian D Walker, Michael S Murri, Orry C Birdsong, Phillip C Hoopes
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...
2018: Medical Hypothesis, Discovery and Innovation in Ophthalmology
https://www.readbyqxmd.com/read/29625459/beyond-hyperglycemia-evidence-for-retinal-neurodegeneration-in-metabolic-syndrome
#20
Cagatay Karaca, Zuleyha Karaca
Purpose: We evaluated the retinal effects of systemic metabolic changes clustered under the umbrella of metabolic syndrome (MetS) in comparison with age-matched healthy subjects. Methods: Spectral-domain optical coherence tomography (OCT) retinal segmentation analysis of 29 patients with MetS and 36 control subjects was performed. Patients with diabetes mellitus (DM), uncontrolled hypertension, retinopathy, high myopia or hyperopia, and posterior segment surgery, were excluded from analysis...
March 1, 2018: Investigative Ophthalmology & Visual Science
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