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Uncorrected refractive error

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https://www.readbyqxmd.com/read/29778107/photorefractive-intrastromal-corneal-crosslinking-for-treatment-of-myopic-refractive-error-findings-from-12-month-prospective-study-using-an-epithelium-off-protocol
#1
Matthias Elling, Inga Kersten-Gomez, H Burkhard Dick
PURPOSE: To assess the long-term effectiveness and safety of photorefractive intrastromal corneal crosslinking (CXL) in patients with low myopia. SETTING: Ruhr University Eye Hospital, Bochum, Germany. DESIGN: Prospective case series. METHODS: Healthy eyes with myopia were treated with photorefractive intrastromal CXL using the Mosaic System. Riboflavin 0.1% solution (VibeX Rapid) was topically administered, followed by 365 nm ultraviolet-A (30 mW/cm2 ) irradiance...
April 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29753851/macular-structures-optical-components-and-visual-acuity-in-preschool-children-after-intravitreal-bevacizumab-or-laser-treatment
#2
Yung-Sung Lee, Lai-Chu See, Shu-Hao Chang, Nan-Kai Wang, Yih-Shiou Hwang, Chi-Chun Lai, Kuan-Jen Chen, Wei-Chi Wu
PURPOSE: To investigate the macular structures, optical components, and visual acuity in preschool-aged children with a history of type I retinopathy of prematurity who underwent either intravitreal bevacizumab (IVB), laser, or a combination of treatments. DESIGN: Comparative interventional case series. METHODS SETTING: A referred medical center in Taiwan. STUDY POPULATION: 80 eyes from 42 patients (33 IVB-treated eyes from 17 children, 24 laser-treated eyes from 13 children, and 23 laser + IVB-treated eyes from 12 children)...
May 10, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29743044/clinical-outcomes-of-transepithelial-photorefractive-keratectomy-to-treat-low-to-moderate-myopic-astigmatism
#3
Lei Xi, Chen Zhang, Yanling He
BACKGROUND: To evaluate the refractive and visual outcomes of Transepithelial photorefractive keratectomy (TransPRK) in the treatment of low to moderate myopic astigmatism. METHODS: This retrospective study enrolled a total of 47 eyes that had undergone Transepithelial photorefractive keratectomy. Preoperative cylinder diopters ranged from - 0.75D to - 2.25D (mean - 1.11 ± 0.40D), and the sphere was between - 1.50D to - 5.75D. Visual outcomes and vector analysis of astigmatism that included error ratio (ER), correction ratio (CR), error of magnitude (EM) and error of angle (EA) were evaluated...
May 9, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29736941/two-dimensional-simulation-of-eccentric-photorefraction-images-for-ametropes-factors-influencing-the-measurement
#4
Yifei Wu, Larry N Thibos, T Rowan Candy
PURPOSE: Eccentric photorefraction and Purkinje image tracking are used to estimate refractive state and eye position simultaneously. Beyond vision screening, they provide insight into typical and atypical visual development. Systematic analysis of the effect of refractive error and spectacles on photorefraction data is needed to gauge the accuracy and precision of the technique. METHODS: Simulation of two-dimensional, double-pass eccentric photorefraction was performed (Zemax)...
May 7, 2018: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/29730856/comparison-of-densitometric-profile-after-deep-lamellar-keratoplasty-with-two-different-techniques-for-treatment-of-keratoconus
#5
Mohammad Ghoreishi, Abolfazl Kashfi, Mohammadreza Peyman, Shahriar Hanjani, Mohaddese Mohammadinia, Mike Straiko
PURPOSE: To compare densitometric outcome of two techniques of deep lamellar keratoplasty using Pentacam HR corneal densitometry software. METHODS: Postoperative outcomes of 31 patients with big bubble (BB) and 28 patients with Melles (M) surgery for the treatment of keratoconus were evaluated. Data were gathered at least 3 months after the removal of all sutures including demographic data, uncorrected distance visual acuity (UCDVA), best spectacle-corrected visual acuity (BSCVA), refraction and endothelial cell count...
May 5, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29715288/population-need-for-primary-eye-care-in-rwanda-a-national-survey
#6
Tess Bright, Hannah Kuper, David Macleod, David Musendo, Peter Irunga, Jennifer L Y Yip
BACKGROUND: Universal access to Primary Eye Care (PEC) is a key global initiative to reduce and prevent avoidable causes of visual impairment (VI). PEC can address minor eye conditions, simple forms of uncorrected refractive error (URE) and create a referral pathway for specialist eye care, thus offering a potential solution to a lack of eye health specialists in low-income countries. However, there is little information on the population need for PEC, including prevalence of URE in all ages in Sub-Saharan Africa...
2018: PloS One
https://www.readbyqxmd.com/read/29700964/refractive-regression-after-laser-in-situ-keratomileusis
#7
REVIEW
Mabel K Yan, John Sm Chang, Tommy Cy Chan
Uncorrected refractive errors are a leading cause of visual impairment across the world. In today's society, laser in-situ keratomileusis (LASIK) has become the most commonly performed surgical procedure to correct refractive errors. However, regression of the initially-achieved refractive correction has been a widely-observed phenomenon following LASIK since its inception more than two decades ago. Despite technological advances in laser refractive surgery and various proposed management strategies, post-LASIK regression is still frequently observed and has significant implications for the long-term visual performance and quality of life of patients...
April 26, 2018: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29685778/multifocal-intraocular-lens-implantation-after-previous-hyperopic-corneal-refractive-laser-surgery
#8
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/29682791/prevalence-of-refractive-errors-in-children-in-india-a-systematic-review
#9
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/29660392/prevalence-of-uncorrected-refractive-errors-among-school-age-children-in-the-school-district-of-philadelphia
#10
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/29657979/ready-made-and-custom-made-eyeglasses-in-india-a-cost-effectiveness-analysis-of-a-randomised-controlled-trial
#11
Blake Angell, Ferhina Ali, Monica Gandhi, Umang Mathur, David S Friedman, Stephen Jan, Lisa Keay
Objective: Ready-made spectacles have been suggested as a less resource-intensive treatment for the millions of people living with uncorrected refractive error (URE) in low-income environments. In spite of this interest, there have been no published economic evaluations examining the cost-effectiveness of ready-made spectacles. This study aims to determine the relative cost-effectiveness of offering ready-made spectacles (RMS) relative to no intervention as well as the relative cost-effectiveness of custom-made spectacles (CS) relative to RMS to treat URE...
2018: BMJ Open Ophthalmology
https://www.readbyqxmd.com/read/29657974/monocular-and-binocular-visual-impairment-in-the-uk-biobank-study-prevalence-associations-and-diagnoses
#12
Martin McKibbin, Tracey M Farragher, Darren Shickle
Objective: To determine the prevalence of, associations with and diagnoses leading to mild visual impairment or worse (logMAR >0.3) in middle-aged adults in the UK Biobank study. Methods and analysis: Prevalence estimates for monocular and binocular visual impairment were determined for the UK Biobank participants with fundus photographs and spectral domain optical coherence tomography images. Associations with socioeconomic, biometric, lifestyle and medical variables were investigated for cases with visual impairment and matched controls, using multinomial logistic regression models...
2018: BMJ Open Ophthalmology
https://www.readbyqxmd.com/read/29625482/distribution-pattern-of-choroidal-thickness-at-the-posterior-pole-in-chinese-children-with-myopia
#13
Junjie Deng, Xiaoli Li, Jiali Jin, Bo Zhang, Jianfeng Zhu, Haidong Zou, Xun Xu, Jingbo Xie, Ling Wang, Shaopin Zhu, Xiangui He
Purpose: To determine the relationship between choroidal thickness (ChT) at the posterior pole and refractive error and to explore the difference between the macular and peripapillary regions in children with myopia. Methods: A total of 340 healthy Chinese children underwent a series of comprehensive ocular examinations including cycloplegic refraction. Swept-source optical coherence tomography was used to measure the ChT in the macular and peripapillary regions...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29619388/the-effect-of-an-eye-health-promotion-program-on-the-health-protective-behaviors-of-primary-school-students
#14
Nukhet Kirag, Ayla Bayik Temel
INTRODUCTION: Undiagnosed and uncorrected refractive errors in childhood can negatively affect the development of vision and cause students to have low academic success and even quit school before graduation. This study aims to determine the effects of an eye health promotion program on the health protective behaviors of primary school students. MATERIALS AND METHODS: This experimental study using a pretest-posttest design with a control group was conducted in three public primary schools in Aydın, a city in the Western Anatolia Region of Turkey, between April and November 2014...
2018: Journal of Education and Health Promotion
https://www.readbyqxmd.com/read/29610024/topography-guided-transepithelial-photorefractive-keratectomy-to-correct-irregular-refractive-errors-after-radial-keratotomy
#15
Mohammad Ghoreishi, Alireza Peyman, Nima Koosha, Khodayar Golabchi, Mohsen Pourazizi
PURPOSE: To evaluate the efficacy and safety of topography-guided transepithelial photorefractive keratectomy (PRK) in a group of patients with post-radial keratotomy (RK) showing irregular corneas. SETTING: Feiz University Hospital, Isfahan, Iran. DESIGN: Prospective case series. METHODS: Consecutive patients who had irregular astigmatism after RK with stable refraction and topography for at least 1 year were recruited...
March 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29607856/hybrid-contact-lenses-for-visual-management-of-patients-after-keratoplasty
#16
Y Altay, O Balta, A Burcu, F Ornek
Aim: This study aims to report the outcomes of new-generation hybrid contact lenses for visual rehabilitation of postkeratoplasty patients. Materials and Methods: Twenty eyes of twenty postkeratoplasty patients were fitted with hybrid lenses. Each patient's keratometric values, ocular surface irregularity indices, central corneal thickness (CCT), uncorrected visual acuity (UCVA), spectacle-corrected visual acuity, contact lens-corrected visual acuity, contact lens fitting data, and contact lens daily wearing time were recorded...
April 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29600186/symptomatic-accommodative-and-binocular-dysfunctions-from-the-use-of-flat-panel-displays
#17
Esteban Porcar, Juan Carlos Montalt, Álvaro M Pons, Enrique España-Gregori
AIM: To determine the presence of symptomatic accommodative and non-strabismic binocular dysfunctions (ANS BD) in a non-presbyopic population of video display unit (VDU) users with flat-panel displays. METHODS: One hundred and one VDU users, aged between 20 to 34y, initially participated in the study. This study excluded contact-lens wearers and subjects who had undergone refractive surgery or had any systemic or ocular disease. First, subjects were asked about the type and nature of eye symptoms they experienced during VDU use...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29596691/prevalence-and-causes-of-visual-loss-among-the-indigenous-peoples-of-the-world-a-systematic-review
#18
Joshua Foreman, Stuart Keel, Peter van Wijngaarden, Rupert A Bourne, Richard Wormald, Jonathan Crowston, Hugh R Taylor, Mohamed Dirani
Importance: Studies have documented a higher disease burden in indigenous compared with nonindigenous populations, but no global data on the epidemiology of visual loss in indigenous peoples are available. A systematic review of literature on visual loss in the world's indigenous populations could identify major gaps and inform interventions to reduce their burden of visual loss. Objective: To conduct a systematic review on the prevalence and causes of visual loss among the world's indigenous populations...
March 29, 2018: JAMA Ophthalmology
https://www.readbyqxmd.com/read/29564408/two-year-results-of-femtosecond-assisted-lasik-versus-prk-for-different-severity-of-astigmatism
#19
Mohammad Miraftab, Hassan Hashemi, Soheila Asgari
Purpose: To compare two-year results of femtosecond laser assisted LASIK (femto-LASIK) and photorefractive keratectomy (PRK) in terms of astigmatism correction in patients with less than 2.0 diopters (D) of spherical error and more than 2.0 D of cylinder error. Methods: In this retrospective study, data were extracted from 100 patient charts. The two study groups were matched by age, gender, and baseline uncorrected distance visual acuity (UDVA) and refractive astigmatism (RA)...
March 2018: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/29550774/prevalence-and-causes-of-visual-impairment-amongst-older-adults-in-a-rural-area-of-north-india-a-cross-sectional-study
#20
Sumit Malhotra, Praveen Vashist, Mani Kalaivani, Noopur Gupta, Suraj Singh Senjam, Ramashankar Rath, Sanjeev Kumar Gupta
OBJECTIVES: To determine the prevalence, causes and associated factors for visual impairment (VI) in rural population of Jhajjar district, Haryana, north India. METHODS: A community-based, cross-sectional study was conducted in two blocks of Jhajjar district. A total of 34 villages were selected using probability proportionate to size sampling method. Adults aged 50 years and above were selected using compact segment cluster sampling approach. Presenting visual acuity using LogMAR E chart was measured along with collection of other demographic details as part of the house-to-house survey...
March 17, 2018: BMJ Open
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